Telephoto lens for motorsport/wildlife - £400ish - I'm all searched out!

[woolcsr]

Canon EF 70-300mm f/4-5.6 IS USM has IS mode 2 as well. I think you will be happy with the lens. I am.

 

[dfrear]

I really can't stretch the budget anymore than about £400.

Would be interested to hear more views on the Sigma 100-300 f4 EX. Finding one used might be a bit tricky though.

I use a 100-300 pretty much all the time, good lens and very sharp. Would recommend it and you can pick them up for ~£400 2nd hand.