Well I gave them a call today and was (politely) informed that they endeavour to process applications within 10 working days and it's only day 7 for me......
And there is a bit of a backlog.....
I explained that I was keen to get it processed by 8th April but she said it really didn't matter about 8th April and anyway it's good enough that they received my application before 8th April
Nevertheless I would really like it processed before that date!!
She also said I could call in personally if I was in the Gatwick area but that's not likely in the near future
I said I would call back at the end of the week.