I ran across this by accident. (That's my story, and I'm sticking to it.)
The guitarists are excessive. The rest of it, bonkers, probably in a good way.
Dave sold me his Vintage fretless. Nice guy, nice chat, nice bass. Despite my shoddy navigation, it was time well spent. I'd be very happy to trade with him again.
Cheers Dave
A quick search gives £175 plus VAT, one day; plus the cost of the test equipment. Completing it successfully would provide a certificate of competence. I have no idea how representative that cost is. Not going to happen for most amateur bands, I guess.