Thanks Neil, I did exactly that yesterday morning, and by the time I got home from work, it had nearly buried itself! How could you tell that it was ready to pupate, and how long will it take before it hatches?

Thanks to you both for the ident, I tried it on fuchsia but it wasn't interested yesterday. I'll see if I can find some galium today. It does look rather splendid!

Which hawkmoth caterpillar is this please, it needs feeding asap! It just turned-up in a consignment of plants from Holland on Wednesday. Thanks.