Hehe, forgot to post yesterday, but I got a call from a different garage and:
MY CAR PASSED WITH NO WORK NEEDED!!!
No sign of the fuel leak, only a small hole in 1 piece of the exhaust but it passed the emissions test, and the play in the joint they also mentioned was just advisory. Forget the number plate as well, that was fine. Takes the wee wee indeed.
So people, avoid Bath MOT Center (no names mentioned...), but Genuine Car Services in Odd Down (South Bath) is fine.