Big fan of Electric Tobacconist. The have lots of deals on liquids and devices. And I always get them the very next day. I've tried many other sites other the past 2 years of vaping, and, frankly, none of them come close. They save me money with their bundle deals (like 4 liquids for a tenner with free postage!) and they have excellent service. I had a problem with a device I bought for them so emailed. They replied within 15 minutes, saying another one would be sent out the same day with a pre-paid return enveloppe. It was. I got it the next day. Outstanding.