Just thought I'd update this for anyone else going through the process at the moment.
I posted my application on the 4th April, I called them every week just to check on progress each time to be told it's working it's way through, on the 28th April the money was taken and according to the FedEx tracking number it was delivered to my neighbour on the 4th May. A little over the 15-20 working days they're apparently working to but I'll get over it.
Too bad I'm a couple of thousand miles away right now though, hopefully all will be in order when I get back.