I'd agree with postcardcv regarding the lens - the 55-250 IS would be a great choice. The 75-300 would be tricky to use without a tripod or monopod at the 300mm end of the zoom (without Image Stabilisation) and the 55-250 is only £5 more expensive. IS is invaluable (if not required) in any long-ish lens when not using a tripod.
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