Kate, I think it may be a Pimpla rufipes. Have a look at images for it and see if you agree. Not harmful to humans apparently, phew!

It looks like one of the ichneumon flies which are a kind of wasp. Harmless to humans.

Hi Shirley and Owdboggy, many thanks for your feedback!!! Very prompt, I appreciate it. I think you're both spot on. It's a definite ringer for the Pimpla Rufipes, from the Ichneumonides family. Thankfully it's not harmful, it did seem keen to escape!

Kate, better out than in then!!

Definitely, Shirley!!! 😁

:o))