you need to get yourself down to a bookies to see the going for yourself, youll soon see if the expected early pace runners are getitng out or not, only takes the first 2 or 3 races to get a grip on the rest of the card.
some tracks are more effected by it than others, i think swindons 2008 drainage system offers a major bias to the outside if its wet.
ive no idea what help i could be but id be interested to see the reults, theres not a huge amount of stats out there on UK greyhound racing, you shoul dask this question on either dailydogs.co.uk or the
betfair greyhound forum, if theres anybody who can help out there then youll find them at one of those two sites