This looks like it would be a great fun race bike, but I'm not sure I'd want it as a road bike. Thanks to Ross for the tip-off. Follow this link to UK eBay (not a) Champion Ossa. The reserve is £2600.
UPDATE: Spurious title on eBay. I should've read it more carefully. It's not a Champions frame. Still neat, but not a desirable (to me at least). G