Re: John Tams Band at Cambridge and PA failure.
I can beat that. I saw the John Tams Band at Sidmouth a few days later (on 5th August, in fact). They were terrific! They told us about the PA breaking down at Cambridge, in pitch blackness, becuse the generator powering the lights had conked out. It kept coming back on again for an instant, but most of the time it was out. So, until they could get an emergency light on, the stage was light by a couple of people holding hand torches (Maglights, to be precise)!
To cap it all, the concert was being recorded to be broadcast on BBC Radio 2. I'm not sure how much of it they'll be able to use, because every now and then the audience suddenly start cheering because the lights have just come back on - but you won't be able to hear the lights, so it might be a bit confusing.
It was an absolutely cracking concert, though. John Tams and Barry Coope have the most gorgeous voices, and the musicianship of the whole band was brillient.