I dont know about "bank / balance certificates". I don't think I have ever had one. But bank statements yes. Bank statements can be asked for at anytime although they are often distributed on a regular basis every month or every quarter automatically by post. I got my bank (Nationwide) to send me 6 months worth of backdated statements which I then got stamped and signed for authenticity at my local branch.
I am also with Natwest and they send me a statement every month automatically.
Everyones circumstances are different but I cant see a need to wait till April for banks statements (unless waiting for a certain amount of time to elapse?). Maybe a couple of weeks....it took me about 2 weeks to get the bank statements requisitioned and delivered in the post then authenticated at my local branch.
