Peckham Knife Sharpening Shop, Free for Life: Blenheim Forge

Blenheim Forge, at Arch 229, Blenheim Grove, London SE15 4QL, will sharpen, service and repair any knife it made for free, for life, but it does not sharpen or service knives by other makers. Owners can drop knives at the Peckham workshop Monday to Friday from 9am to 5pm, and the current lead time is one to two weeks. If your knife came from somewhere else, the useful offer here is the £50 Introduction to Sharpening class, where you can bring your own knife.

Blenheim Forge was founded in 2014 by Jon Warshawsky and James Ross-Harris, and Richard Warner later joined the team. The workshop sits in a railway arch on Blenheim Grove, the short street that runs beside the tracks next to Peckham Rye station, and it is a working forge rather than a showroom: steel is forged and ground here before each knife is handled and sharpened.

The site's Forge Collection covers the familiar Japanese-style shapes, including gyuto, santoku, petty and nakiri knives, alongside special editions and sets that sell out quickly. Because the same people who forge the steel also sharpen it, the free lifetime service is less a sales gimmick than a way of keeping their own edges in good shape. It is also why the workshop draws a firm line at other brands.

The sharpening page spells it out: Blenheim Forge sharpens, services and repairs all Blenheim Forge knives for free, for life, and does not sharpen or service knives by other makers. If you walk in with a Victorinox chef's knife or a Global santoku, the team will turn it away. That is the honest answer to anyone searching for a general knife sharpening shop in south-east London.

For owners, though, it is one of the best deals in the city. A chipped tip, a dulled edge or a worn bevel on a Blenheim Forge knife costs nothing to fix at the workshop. Owners who live further away can post their knives in, and the return postage and packing fee is £15. Everything else about the service is free.

Drop-offs are accepted Monday to Friday from 9am to 5pm, and collection runs on the same weekday hours. The workshop is not set up as a weekend shop, so plan the trip on a weekday lunch break or a day off. Bring each knife clean and securely wrapped, in a box, a knife roll or a tea towel, because the team asks for exactly that on its sharpening page.

The lead time for sharpening and repairs is currently one to two weeks. If you need a knife back on the same day, the workshop asks you to email info@blenheimforge.co.uk in advance rather than turning up and hoping. My advice is to plan for the two-week figure: forge work, orders and repairs share the same bench, and a same-day request only works if the team has agreed to it beforehand.

If you own knives from other makers, the workshop's Introduction to Sharpening course is the way in. It costs £50 per person, lasts one and a half to two hours and takes a maximum of six people. The class covers grit progression, choosing a Japanese whetstone, basic technique for kitchen knives and care between sharpenings, and it ends with a tour of the workshop and the basics of how the knives are made.

Crucially, the course page says you can bring your own knife or use one of theirs, so a home cook with a dull santoku from anywhere can leave with it sharpened by their own hand. Sessions run on Wednesday evenings at 6pm and Saturdays at 12pm; the remaining autumn dates include Saturday 24 October, Wednesday 4 November and Saturday 28 November. An Advanced Sharpening Class follows for anyone who already knows the basics.

Skip the trip to Peckham if all you want is someone else to sharpen a non-Blenheim knife this week. Kitchen Provisions at Coal Drops Yard in King's Cross takes knives from any maker for a typical £12 each and usually returns them in a couple of days. KATABA in Covent Garden hand-sharpens Japanese and Western knives from £1 an inch, though its lead time runs to 10 to 14 working days.

Both are a train ride from Peckham Rye, so decide before you set out. If you already own a Blenheim Forge knife, though, there is no reason to pay anyone else: the free service at the arch covers sharpening, servicing and repairs, and the people doing it are the ones who made the knife in the first place.

The people dropping off knives are mostly London home cooks who bought a Blenheim Forge gyuto as a gift or a long-planned purchase and want its first proper edge back, plus chefs from south London restaurants with a roll of well-used knives. On class days the room fills with up to six beginners standing at the whetstones, most of them carrying a family knife wrapped in a tea towel.

The unspoken etiquette is the same as in any working forge. Keep clear of the machines, do not touch knives on the bench, and wait to be called over rather than walking into the workshop. The team is happy to talk steel and shapes when there is a lull, but a weekday afternoon in the middle of a batch is not the moment for a long conversation.

Peckham Rye station is a short walk from the arch, and its restored Victorian station building is worth a look on the way. Rye Lane, the busy high street south of the station, is lined with Caribbean and West African grocers, bakeries and market stalls. For a slower hour, Peckham Rye Park and Common lie further south, with lawns, ponds and the formal Sexby Garden.

The Bussey Building and Peckham Levels, the converted car park with studios and food stalls, are both close by for a drink or lunch before a Saturday class. If you are collecting knives, pick them up first and keep the wrapped bundle in a bag, rather than carrying sharp steel around Rye Lane's crowded pavements.

Address: Blenheim Forge, Arch 229, Blenheim Grove, London SE15 4QL. Sharpening drop-offs and collections: Monday to Friday, 9am to 5pm. Sharpening, servicing and repairs are free for life for Blenheim Forge knives only; knives by other makers are not accepted. Lead time is currently one to two weeks, and same-day work must be requested by email in advance. Return postage and packing costs £15.

The Introduction to Sharpening class costs £50 per person for one and a half to two hours, with a maximum of six people; bring your own knife or use one of the workshop's. Contact is by email at info@blenheimforge.co.uk. The nearest station is Peckham Rye, with Southern and Thameslink trains plus the Overground.