I just want to give a big thumps up to
Russ Tyres in Portsmouth.
A little while ago he plugged a hole in my front tyre (caused by a bolt that was stuck in it) for a very reasonable £25 RIRO.
Subsequently, however, it seemed to have picked up a slow leak, losing maybe 1 psi a day and when I popped back, after a quick check with some spray, it appeared that the valve was leaking, so he put in a new core.
Unfortunately, even after that, the tyre was still losing pressure, so I went back again and this time he took the wheel and tyre off and found that the 90 degree valve that he'd put on there for me about 8 years ago had corroded and the air was actually leaking out from the base of the valve.
So he put a new one in, popped the tyre back on and now it's sorted.
"How much do I owe you?" I asked.
"No charge" he said!
Great bloke, great service and I'll definitely be going back there in a few months when I need to replace my T30 rear