Ideal Tool Kit

It does come with an 8mm - dont know why its not listed

It does, it's just listed seperately from the others for some odd reason.

I have one of these, great basic tool kit, you can buy more specific tools, like a track chain whip as and when you need them

http://www.evanscycles.com/products/ice-toolz/essence-tool-kit-for-home-mechanics-ec006795

Home mechanics tool kit - High quality tools in strong portable case. - Includes: ISIS/ Shimano BB tool, 8 Groove spoke wrench, Cassette tool, Crank puller, Chain tool, 2, 2.5, 3, 4, 5, 6mm hex key set, 6" Adjustable wrench, 8mm Hex key, 8 & 10mm open ended spanner, 2 x Flat head screw drivers, 2 x Cross head screw drivers, ½" drive adaptor, Hollowtech 2/ MegaExo adaptor, Chain Whip, Pedal & box wrench, and Nylon tyre lever set.