French alpinist and member of the Chamonix mountain rescue team (PGHM) Jeff Mercier recently visited the UK to sample some of the hardest dry-tooling routes. During his trip Jeff onsighted Greg Boswell's route Powerdab D13 - contender for the hardest route of its kind in the UK - at The Works, Hodge Close and managed to complete every hard route at the crag in the two-day period before returning to France.