Thanks for the feedback everyone. Yes I realise this has been done before, but then what hasn't? I am starting to believe that trainer miles DO count. The reason is this. Imagine you are rolling down a huge decent for 15miles, not pedalling, just rolling down in a tuck position. How far have you ridden? In reality you haven't ridden anywhere, gravity has done it all for you. Whereas if you did 15miles on the trainer, you have actually done a lot more work. Just more coal for the fire

CHEERS.

Mark