Well I got it to them and collected it cost £23 in travel.
Case was replaced under warranty.
Bluetooth is now unavailable and my video output is a funny colour.
I rang the service centre. He said it was not tested long enough! so why the **** did he say to go pick it up?
I now have to wait until Tuesday for an "engineer" to call.
I hate apple.
This is exactly why I don't want to have my machine sent in to fix the cracks. The one time I had to send it in for service, I was stuck without my machine for a month, not because of the original problem, but because I had to send it back immediately because the tech screwed it up. It took them longer to fix the problem that they caused than it took to fix the original problem. In my experience, Apple's "engineers" are half-ass.
I can't be without this machine for a month because of a cosmetic problem. If it were another dead logic board, it would be one thing, but this is just hairline cracking of the case. It has no effect on my daily work.