So, even though I was drinking quite heavily up to 7 weeks ago that doesn't really matter then? It what I have drank or not drank recently that counts?
It depends on what your consumption was in the intervening 7 weeks. If you have drastically cut back then your CDT would have started to fall significantly and a 24 day total abstention now, or starting last weekend, will most likely see you ok.
It's generally considered that a daily consumption of around 50g, or less, of alcohol will not radically affect your CDT. That's equivalent to about 5/6 units a day. That's about 2 pints of Fosters, 2 medium (175ml) glasses of average strength wine or 2 pints of Courage Best. However, I think it best to go for total abstention rather than risk it for the sake of a few pints of Carling!!
Binges have been reported to make a difference so don't go saving up your weekly 'allowance' to have in one night!
Basically, even if you were drinking heavily up until 7 weeks ago but then drastically cut back, your CDT would have started to fall. Make sure that you drink NO alcohol between now and until your medical and you should be ok.
It is possible to get a home
CDT test done. A company called Medichecks, who advertise on here, charge £79 for a finger prick test that they turnaround in 5 days. I've not used them but they seem to be reliable and pretty accurate. Personally I think it may be a waste of money for you but it might help to reduce your anxiety, so that would be worth 80 quid, but there's little you could do even if the result were to come in high. It's the sort of test I would suggest to someone before they sent in their application.