I have a Kodak Gear 80-210mm f/4.5-5.6. It cost me sixty pounds.
No, it's not L standard - it's a long way from it. But cheaper lenses will still cover the distance and produce decent results.
If you really want L standard glass, look out for the 80-200mm /2.8 L on
eBay (about 500 dollars or 400 pounds, probably) - the predecessor to the 70-200, it's still a very good lens by all accounts, or consider the 3rd party equivalent to Canon's current lens - Sigma offer a 70-200 /2.8 which many report being the equal of the Canon (but still beyond your budget).
Depending on what you're photographing, and your personal preference, it may be worth considering a 85mm, 100mm or 135mm prime lens - there are great options from Canon within your stated price range.
Personally I own a couple of older manual lenses at 85mm and 135mm which are great for portraits (but hard work for action photography). In fact, I got all three of my longer lenses (80-210 zoom, 85, 135) by spending less money in total than just Canon's 85mm/1.8 would have cost me, and am really happy with them.
This was shot on the Kodak Zoom:
Lioness by
Neil Gratton, on Flickr
This was shot with the 135 (Jupiter 37A)
Verena by
Neil Gratton, on Flickr
I only just got the 85 /2 (Jupiter 9), so no samples on flickr yet
