www.ukbutterflies.co.uk

Hello could anyone identify this catapiller? He eats grass

That looks like an early instar (i.e. young) Drinker moth caterpillar- Euthrix potatoria. Once he/she has eaten a lot more grass, it will be quite different looking... and quite a bit bigger.

Trev

Ideal thank you, just googled them in the early stages and it looks spot on.