People don't normally post this sort of thing but if you need race supplies then http://www.discount-supplements.co.uk/high-5-race-faster-marathon-running-1-pack have a high-5 pack for £6 which gets you:

14 gels (with caffeine)
2 drink sackets
1 energy bar
13 zero tabs

Pretty hard to beat for value unless you are rather sensitive about caffeine.

Andrew

Sounds great Andrew, thanks for the heads-up!