A ring should read something like this > > 1 PSUK LHC 10W
"1" is first chick of that species hatched, PSUK is Parrot Society of UK, LHC is breeder initials or aviary name, "10" is hatch year(2010) and W is ring size. You could contact the Parrot Society of UK to ask the ID letters of the aviary or breeder.
Does that help you?, if not post the ring number, and I'll do a bit of scouting about for you