Where can I safely buy Diazepam (Valium)?

In a nutshell my doctor has a stick up his backside about prescribing me the above. I do not abuse it in any way and rarely get through 14 2mg pills in an 8 week period. I have a mental health condition and I get panic attacks a lot. Most of which I can manage myself but sometimes I need a helping hand, which is where this medication comes in. I do not need any lectures off anyone here, just would like to know if any of you know of a reliable online pharmacy I can buy them from? I'm a little paranoid that I might get given something that's not Diazepam, the last thing I want is to take something unsafe. I live in the UK, I don't really care where it comes from as long as it actually is Diazepam at the stated dose.