Please may you give me some critique and feedback as to how to improve

[D-pearce92]

Hi all i took up photography last year with a bridge camera and went to silverstone and ever since then ive been hooked on motorsport photography, for christmas i got my first dslr and 55-250 lens and a season ticket for lydden hill, i've been to Lydden hill pretty much every weekend its been on, only missed a couple of events this year so far. I picked up a 70-200 f4.0 last week and used it for the british rallycross on monday. I would be really greatful if you can critique/feedback these for me. I hav just enrolled in a photography course at college and hope this will help me further in other aspects as well as the motorsport field.

http://www.talkphotography.co.uk/forums/showthread.php?t=348036

Many thanks Dex