Large Cobalt blue Vase

I just popped down the road to post a letter, and went a bit farther to the local furniture charity shop, which still has some nice bits and pieces. I fell for this gorgeous cobalt blue vase, so picked it up for £3. I really don't know much about it, but it has some sort of optic pattern on the inside and ribbed on the neck, with diamond pattern on the outside at the base. I have no idea of age and make, but love it. Any ideas?