Found a little gem today!

I came across this gorgeous little pot in town today and couldn't resist buying it. It's beautifully made with a grey-green celadon glaze on the inside..measures about 3 inches wide. I absolutely love it and would really like to know who made it..does anyone recognise the potter's mark I wonder?

I've looked in the second edition of British Studio Potters' Marks, but so far no luck..