The Radio Society of Great Britain RSGB and Ofcom have reached agreement on the optional use of special callsigns for the period of the Olympic Games and Paralympic Games. This facility will exist for a seven week period, using the letter “O” and will also be available to Amateur Club licences. Furthermore, calls in the series GB2012aaa will be available for Special Event Stations relating to the Olympics and licences will be issued for four “flagship” stations using the prefix 2O12a where “O” is the letter O, and a is a single letter relating to the location of the station.

Callsign: the letter O will be added to calls, or replace the regional identifier. For example (where “aaa” represents the final alpha block of the callsign):