I posted this a couple of months ago and it got lots of interest. I've just checked and the discount code is still working so I thought a repost would be appropriate. Lovely looking watch for just a touch over £20.
it's a sensible 40mm size with a 2 Year warranty and is 50m water resistant (so should be fine for a splash in the pool). 4.8 out of 5 in customer reviews.
GB Watch Shop is UK based, so no worries about import duties and VAT; when I ordered a watch from them it was delivered very quickly too.