Thanks for all your feed back and advice.
I've got the ABS tested with a diagnostics machine and the Front LHS sesor is not working, got one on order and hopefully thats a tick in the box.
I've changed the coolent sensor on the engine, i've been told this is a common fault which makes the engine run rich as it thinks its still on warn up so over compensates with more fuel.
When i had the diagnostics done they said the idle rev sensor was also playing up but cannot find this in my factory repair manual so will put through a MOT again when i've fitted the ABS sensor and go from there......
Again thanks for your help and if anyone knows anything else to look at for the emmissions it would be appriciated
Cheers