We have put a number of sheets of corrugated bitumen out in the garden and, in less than a week, reptiles have started to use them. Yesterday we had all four of the Pembrokeshire reptiles, which was nice. The best was six slow worms, one of which was moulting.
The Grass Snake was tiny: less than 10cm long, and looked like a jewel. I presume it has hatched this year.