The UK has demanded age verification for sites that contain images unsuitable for under 16 or is it 18? Trouble is many sites worldwide do not have age verification that the UK is happy with and no one in the UK government has gone through all the images to ensure that only suitable images are hosted.
At the moment jatws.org works but if it gets onto the UK list of dubious sites than I can't be bothered setting up and paying for age verification.