To update this post, the BSG was replaced in 5 days, less if we don't include the weekend. Very pleased with the way this repair was handled from start to finish.
Now for the not so good bit. I was contacted to let me know that one of my wheels had been damaged and they needed 2 days to get it repaired. I'm a reasonable guy and although not pleased, fully understand that sometimes stuff just happens. I do appreciate the open and honest way they put their hand up to this. However another tyre on a different wheel has a big cut out of the sidewall and I dont think it's safe to drive on. I'd say it's been swapped from the wheel that sustained damage but cannot prove this.
Overall, feeling happy to have the car back but can't help feeling let down at the end.
Hope everyone else gets their broken motors back on the road without further problems.
StandFree.