Major improvement:
One central website where I complete the form online. It is then automatically distributed to the appropriate agencies (recognising the appropriate police authority from the airport code, or forcing me to pick one if it's an unrecognised code).
I should then get a confirmation page, with confirmation number and time, listing the agencies to which the details are distributed. I now have only had to complete the form once, and have proof that I have submitted it, and the time that I have submitted it, and don't even have to know which authority/district needs to get it.
Minor improvement:
If only a minor improvement could be made, then perhaps a list of each police area, and showing the airports that they cover would be VERY useful to us foreigners who don't know UK counties very well
It's often a struggle to find with district to send the form to.
dp