In case you can;t find any from the users here, Cycle Surgery will price-match online shops, so you might be able to save some money that way. Pitlock themselves also ship direct, they tend to be cheaper than most UK re-sellers that I've seen.
@Dix started
London Fixed Gear and Single-Speed is a community of predominantly fixed gear and single-speed cyclists in and around London, UK.
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In case you can;t find any from the users here, Cycle Surgery will price-match online shops, so you might be able to save some money that way. Pitlock themselves also ship direct, they tend to be cheaper than most UK re-sellers that I've seen.