If you are a prefix hunter -- or you just get caught up in the pageantry that a Royal Wedding can bring -- then take note: Ofcom, at the request of the Radio Society of Great Britain (RSGB), will issue special temporary call signs that British amateurs may use from April 29 through May 9, 2011, commemorating the marriage of HRH Prince William of Wales and Miss Catherine Middleton. Amateurs in the United Kingdom who choose to apply for these special call signs will be using GR, MR and 2R prefixes during this time to commemorate the wedding.