i used Ashleigh a few years back and found them to be very expensive :( They also promised to keep me updated on some skin samples that were taken from a water dragon that had to be PTS and didn't hear anything back despite lots of phone calls.
I'm not sure about Stockport way, but there is Pennine vets in Tottington, Bury and they also have a practice in Harwood, Bolton. I've not used these before, but have only heard good things about them..... http://www.penninevets.co.uk/