Ofcom allows those who pass the amateur radio Full exam to select a callsign from the old G and M call blocks including G3, G4, G5 and M5

In recent weeks a number of those passing their online remote invigilation Full exam have chosen to take the opportunity to get one of these callsigns. It requires paying a fee of £20 but enables amateurs to get a call suffix with letters that are meaningful to them.

G or M + 3 letter calls for a Full licence can be obtained from Ofcom by filling in a paper application form and giving your three preferred choices of callsign.

Download OfW346 - https://www.ofcom.org.uk/__data/assets/pdf_file/0019/47233/OfW346.pdf