Thanks, Les. I'm seeing the light again...
I was in liaison with Les a month ago, having had a bulb pop (I'll bet that's not the terminology for HID stuff) and, with no previous experience of HID, just didn't know what to do, what to order as a replacement or even how to go about fitting it (C'mon, if your only previous experience is with H7s, it's a bit of a shock to see how much has to be replaced with an HID set-up).
The point is that I contacted Les and he was extremely willing and helpful, talked me through the whole thing and sent a replacement burner and other bits so that it arrived almost before I put the phone down.
Thanks, Les. I'll be back.