Where do you buy your valves/tubes in the UK?

ICBM

Karltone or TAD in Germany.

I've had problems in the past with both Watford and Hotrox, wouldn't use them again.

rico

Karltone - I got some spare valves delivered last Saturday for a NYE gig and I’m sure they were technically closed. Great service. 

Boromedic

HotRox have been great for me, although thats in person rather than online. Watford annoy me with their stupid pricing which when you first order you don't realise its minus VAT till you hit the checkout. That aside they shipped fast and the valves were great. 

Dodge

Tube Town in Germany. Avoid that arrogant lying twat at Watford Valves.

Collings

I always use Hotrox and have never had a problem. I would say don't bother paying for the extra next day delivery as quite often they send it 24hr anyway. This has happened a few times i,ve ordered somthing. As an example i ordered one 12ax7 on Friday afternoon and selected the cheapest delivery option as i was in no hurry but it was still sent parcelforce 24 and arrived on the Sat morning.