Sorry for the delay. I don't know but I imagine it might be difficult. Hopefully Foggy will be along soon to clarify.
Sharing from experiences of dealing with debt
The greatness of a man is not in how much wealth he acquires, but in his integrity and his ability to affect those around him positively.
Bob Marley. http://kallis3.blogs.iva.co.uk
First --- is the PTA registered as a charity with the Charities Commission (as many are) ? If so, you are disqualified from acting as a trustee. What is your position in the association ?
You can open an account -- which will be in the name of the PTA, but I would be disinclined to be a signatory on the account and you might well be barred anyway by the PTA's constitution. So this would need to be checked.
In the meantime I would have an informal chat with one or two banks to see what their requirements are.
My opinions are merely that .. opinions based on experience. Always seek professional advice.
IVA Completed 23rd July 2013 .... C.C. 10th January 2014 http://foggy.blogs.iva.co.uk