Visiting caterpillar

Found sitting on a red gooseberry bush. I have no idea what species it is, so if anyone can tell me, I'd be very grateful.

It is about an inch long, and only a few millimetres wide. I have put some other shots from different angles in my blipfolio if that helps anyone to identify it.


Update: Many thanks to MsQuizzical2 who has identified it as a Rusty Tussock Moth or Vapourer, Orgyia antiqua