Ok so I've called Unite HQ and after being on hold for about 20 minutes I was told that as I'm the only one that has asked for these accounts it will take 2-3 weeks to organise.
They have to contact BASSA as they don't have the info to hand.
If there are any other Unite members or ex members can you please call Unite HQ tel 0118 907 0715 or 0845 605 2193.
I get the feeling they are a bit taken aback by my request.
ps 123 thanks for the warning. As I say I'm not (yet) suggesting that anything's wrong just that it seems disorganised and haphazard. Not what I expect from a professional union.