Haven Knox-Johnston Boat Insurance

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Haven Knox-Johnston has been putting British boats on cover since the 1970s, and the second half of the name is not marketing. Chris Knox-Johnston — brother of Sir Robin, who took the ketch Suhaili non-stop around the world in 1968 to win the Golden Globe — ran a marine brokerage that was bought by Murray Lawrence and Partners and folded into the Haven book. The firm that came out of it has spent five decades quoting yachts, narrowboats, RIBs, dinghies and motor cruisers, which is a longer run at the job than most of the names a search engine will put next to it.

Today it trades as Haven Knox-Johnston, a trading name of Howden UK Brokers Limited, authorised and regulated by the Financial Conduct Authority under firm reference 307663. That parent is not a small one: Howden runs $51bn of premium under management for around 1.7 million clients, employs roughly 24,000 people across 100 countries, and is the fifth largest employee-owned business in the United Kingdom. The marine desk sits at Malling House in West Malling, Kent, on 01732 223650, with in-house underwriters and an in-house claims team rather than a call centre pointing at somebody else's.

The headline cover is generous by the standards of the market. Third party liability runs to £5 million as standard, no-claims discount starts at 5% and builds to 25% after five claim-free years, excesses can be cut by up to 50% on a clean record, and mid-term changes carry no administration charge. Feefo, which collects only from verified buyers, shows a service rating of 4.8 out of 5 from 11,625 reviews in the past year and a Platinum award. The risk itself is carried by MS Amlin Marine under a three-year underwriting agreement announced on 5 January 2024. What decides a claim, though, is none of those numbers — it is the cruising range printed on your certificate, and that is where this review spends most of its time.

From Suhaili to a £51bn broker

The lineage is unusually easy to trace, and it explains why the desk knows what a spinnaker pole costs. Haven was founded in the 1970s by Murray Lawrence and Partners; the Knox-Johnston brokerage was absorbed in the same decade. Murray Lawrence merged with Angerstein in the 1990s to create Amlin, which bought the yacht brand St Margarets and later merged it into the Haven Knox-Johnston name. In September 2012 the whole thing began trading as MS Amlin. It came back out as Haven Knox-Johnston in 2019 under Aston Lark, and Aston Lark was bought by Howden.

The paperwork behind that last step is worth knowing, because it is the entity whose name appears on your documents. Companies House records show company number 02831010 incorporated on 28 June 1993, trading as Aston Lark Limited from 28 June 2018, and renamed Howden UK Brokers Limited on 29 September 2023. Its registered office is One Creechurch Place in the City of London. If you hold a policy bought before autumn 2023, the wording in your folder will name Aston Lark and the current one will not — same firm, same reference number 307663, different letterhead.

Sir Robin himself remains the reason anyone remembers the name. The 1968 Golden Globe made him the first person to sail single-handed and non-stop around the world; he was knighted, took Yachtsman of the Year four times, and at 67 placed fourth in class in the 2006-07 Velux 5 Oceans, becoming the oldest solo circumnavigator. Paul Knox-Johnston still fronts the business as sales and marketing manager. None of that underwrites a hull, but it does mean the people selling the policy have a family stake in not embarrassing the name.

Two tiers, and what each one actually carries

The range narrowed into two clear products, announced through British Marine on 30 May 2024 alongside a quote engine that returns a dinghy price in under 30 seconds. Base Layer is the basic tier, aimed squarely at the cover a sailing club or a regatta entry demands before it will let you on the water, and it carries the same £5 million third party liability. All Weather is the full policy: accidental damage afloat and ashore, cover during lifting, haul-out, launching and road or ferry transit, and racing cover for sailing vessels where it has been agreed and noted.

Several inclusions are better than the market average and worth pricing in before comparing headline premiums. Thirty days of European continental waters come with the All Weather policy at no extra cost, which covers a Channel season or a run down the Brittany coast without a mid-term endorsement. A tender and its outboard are insured free up to £350 combined. Race entry fees are covered to £1,000. There is no excess at all on a loss inside a purpose-built marina, which quietly removes the deduction from the single most common claim type. Berth arrangements do not restrict the quote — pontoon, swing mooring, drive-on and dry stack all price through the same route — and mid-term adjustments cost nothing to make.

Discounts stack in a way that rewards staying put and staying clean. Marina berth holders in the UK get an automatic 10%. Boats introduced through a partner marina group can attract a further 10% on that scheme's terms, so ask your harbour master before you quote directly. The no-claims ladder adds 5% a year to a ceiling of 25%, and a clean record can also buy down the excess itself by as much as half. Single-handed sailing is permitted as standard, which many marine policies will not do without a specific endorsement — subject to a limit covered in the next section, and that limit matters more than the permission does.

The line on your certificate that decides the claim

Marine cover does not work like motor cover. There is no equivalent of driving anywhere in the country on the same certificate: a boat policy names a cruising range, and outside it the cover simply stops, with a narrow exception for movements made to safeguard the vessel or the people aboard. Haven Knox-Johnston publishes range maps for both inland and coastal use so you can see the boundary before you buy rather than after you have crossed it. Getting that line in the right place is the single most consequential decision on the quote screen, and it is worth ten minutes with a chart.

The All Weather wording carries one condition that short-handed sailors need to read twice: the vessel must not be navigated single-handed by anyone for a period in excess of 18 consecutive hours. That is a real constraint rather than a technicality. A solo Solent-to-Cherbourg hop fits comfortably inside it; a solo run from Falmouth to the Scillies and on to southern Ireland does not, and neither does most of what a shorthanded cruiser would call a passage. Two people aboard on watches resolves it. One person and an autopilot does not.

Cruising abroad brings its own paperwork on top of the insurer's. The RYA's country guidance, updated on 11 August 2026, tells British boats heading to Croatia to carry proof of third-party liability insurance, evidence of ownership or a power of attorney, evidence the boat is seaworthy, and a valid International Certificate of Competence. A £5 million limit satisfies every European harbour authority a leisure boat is likely to meet, but only if the certificate in the chart table shows the country you are sitting in as inside your range. As for how often this matters: RNLI crews launched more than 9,000 times in 2025, the charity's sixth busiest year on record and about 25 launches a day, including 951 to motorboats and 713 to sailing vessels, and saved 272 lives. Most of those boats came home. The ones that did not still had to be paid for by somebody.

What the wording deducts before it pays

The All Weather booklet published while the firm traded as Aston Lark sets out the deductions plainly, and prospective buyers should check the current version says the same before assuming any of it. Claims on protective covers and canopies, machinery other than outboards, batteries, tenders, paintwork and surface finishes, upholstery and soft furnishings, and masts, spars, sails and rigging can be reduced by up to 30% where replacement would leave the item in better condition than it was before the loss. On a ten-year-old suit of sails that is the difference between a repair bill and a new mainsail, and it is the usual reason a marine claim settles lower than the owner expected.

The sub-limits are modest against the value of what people keep aboard. Personal belongings are capped at £1,000 with a ceiling of £350 on any single item unless separately agreed, and carry their own £100 minimum excess — a chartplotter, a good sextant or a laptop will breach the item cap on its own. Outboard motors and tenders carry the same £100 excess floor. Emergency medical expenses run to £1,000 per person and personal accident benefit to £15,000 for death, permanent disability or loss of limb or sight, which is a fraction of what a standalone policy would provide and should not be mistaken for life cover.

Racing is available but priced for. Where racing risk is agreed and shown on the certificate, a claim arising from it attracts an extra excess of 1% of the sum insured on hull, machinery, gear and equipment, or £250, whichever is greater — that is £750 on a £75,000 boat, on top of the standard excess. Racing cover is confined to sailing vessels. The general exclusions are conventional and no less expensive for it: gradual deterioration, latent defect, osmosis and fungal growth, water ingress that is not sudden and unforeseen, frost damage where no preventative measures were taken and recorded, theft without forcible entry, and war, terrorism and civil unrest. Osmosis alone quietly writes off a good number of older GRP hulls and has never been an insured peril anywhere in this market.

Two protections that do not reach this policy

Boat owners tend to assume the same regulatory scaffolding stands behind their marine cover as behind the car on the drive. It does not, in two specific respects, and neither is the broker's fault — both are how the rules are drawn.

The first is compensation. Haven Knox-Johnston's own policy booklet states that marine types of insurance are not covered by the Financial Services Compensation Scheme, and the FSCS says the same from its side: its published guidance confirms it does not cover reinsurance or marine, aviation, transport business and credit insurance. Where a household or motor insurer failing would leave a claim protected, a marine insurer failing leaves the policyholder ranking as an ordinary creditor. The protection that does apply to money handled by the broker is a separate question, and one worth putting to the firm in writing before a large premium changes hands. The Financial Ombudsman Service remains available in the usual way — complaints go to Haven Knox-Johnston at Malling House first, and to the Ombudsman if eight weeks pass without resolution.

The second is price. The FCA's pricing remedy in PS21/5, published in May 2021, is the rule that stopped insurers charging renewing customers more than an equivalent new customer. It applies to home and motor insurance and nothing else. The FCA found 6 million policyholders paying high prices in 2018 who would have saved £1.2bn between them at the average price for their risk, and then fixed the problem for two product lines. Boat cover is outside it, so a quiet renewal here carries no regulatory promise that the price matches what a new buyer would be quoted. Nor is there any published benchmark to check the firm against: the FCA's general insurance value measures data, published on 21 July 2026 for calendar year 2025, reports claims acceptance rates for motor at 99%, travel at 83-86% and home at 62-71%, and does not report marine leisure at all. Anyone quoting a boat insurer's claims acceptance rate is estimating it.

What could not be pinned down from outside the quote funnel

Three things resisted verification and are flagged rather than guessed. The Defaqto five-star rating the brand has been associated with attaches to an All Risks boat policy rated in 2015; no current Defaqto or Fairer Finance position for the 2026 product could be confirmed from a primary source, and an eleven-year-old star rating is not evidence about today's wording. The published All Weather booklet names MS Amlin Insurance SE, licensed by the National Bank of Belgium, as insurer, while the January 2024 announcement names MS Amlin Marine — likely the same group through a different carrier, but the entity on your own schedule is the one that pays, so read it. And the policy documents and product information sheets listed on the site did not serve when requested directly, so every figure here comes from the wording, the firm's announcements or the scheme partners quoting it, and each should be confirmed against the certificate you are actually issued.

Two questions are worth asking on the phone before buying. First, whether salvage and wreck removal are covered beyond the costs you personally incur to prevent a loss, because the booklet frames that benefit around your own expenditure and a sunk hull still has to be lifted. Second, what survey the underwriter will want at your boat's age — marine insurers routinely require one on older vessels and the requirement is not published anywhere a prospective buyer can read it.

Figures were taken from each provider's own published terms on 23 August 2026. Variable rates can change at any time — confirm the current rate with the provider before applying.