Amateur Radio/Getting started
From London Hackspace Wiki
So, you just passed your exam. What to do?
Around six days from your examination pass, you'll get a note in the mail with details that will allow you to register on the Ofcom website. Choose a callsign that is meaningful to you, such as your initials, something that sounds cool in NATO alphabet terminology, or perhaps something that is easy to enter in Morse Code.
It might be worthwhile to run a 'callsign scrape' of the Ofcom website using Mark Steward's code hosted on github.