Further to my and PN's point, they will remember where you live right up until you sign and return the Official Secrets Act. Then your file is closed (presumably in the round filing cabinet) and you cease to exist. You will probably never hear from them again, even if you want to.
Wise words about the medals, PN.
It's a really good idea to get uniform/medal/RAF stuff sorted now as it's much easier than once you're out.
Courtney