It seems highly likely that the ACE CUTTING REPLACEMENT BLADE GT2616-1 will fit priced $4.99 from Denny & Kathy's Superstore USA - shipment to UK from USA seems to be a bit problematic - I am working on that.
ACE HARDWARE STORES USA all want around $30 for shipping to UK via AMAZON.com
Its worth a try at $4.99 but shipping costs currently prohibit purchase
Ken Porter, February 2010