OMG, what a journey Mumsneedwine! Adrinkofwater, hope travelling will be ok for your DD today. It's hard to imagine as we haven't had a drop of it here in the South. There might be quite a few candidates who won't make it at all, how awfully stressful. Good luck to both of them today 
2B1Gmum, I really feel for you. It was my biggest concern when we opted for the 6th form DD goes to. They have only been a 6th form for 3 years and there were rumours of funding issues and disgruntled teachers threatening to leave. DD's biology teacher was off for many months two years ago, and it really affected those doing Biology A levels that year. I was worried she might go off again or leave, but she's been there since and doing a great job. DD's Chemistry teacher left last year, but thankfully her new teacher is very good. It's been a constant worry but nothing we can do about it if it happens and indeed, best way to deal with it and trying as much as possible to do work and revision amongst themselves. Hopefully Bio teacher will be back soon.
Thank you for the tips about SGUL interview. I had a look and found it. Arranging a session with DD to 'test' her. Amazingly, she attended a seminar last Friday and found out that one of the girl there has an interview there on the same day and same time, so will be nice to wait together.
Thanks ProfessorLayton for your tips, it's really nice to have people coming to post with advice.
Anyone else has interviews this week?