ProAV

Good site for professional video kit. They sell genuine & legit UK spec goods and have a physical presence in a warehouse in Hertfordshire that you can visit and trial various bits of gear. In other words, they don't just hide behind the website. I've bought twice from them and so far I'm very happy. Their prices, while competitive, aren't necessarily the cheapest you'll find online, but you pay slightly more for a dependable interlocutor.