| Issuer | United Kingdom |
| Year | 2011 |
| Type | Non-circulating coin |
| Value | 50 Pence |
| Currency | Pound sterling (decimalized, 1971-date) |
| Composition | Gold (.9167) |
| Weight | 15.5 g |
| Dimensions | 27.3 mm |
| Thickness | |
| Shape and Technique | Equilateral curve heptagon (7-sided) Milled |
| Orientation | Medal alignment ↑↑ |
| Engraver(s) | Obverse: Ian Rank-Broadley Reverse: Neil Wolfson |
| In circulation to | |
| Reference(s) | Sp#LO12 |
| Obverse description | Fourth crowned portrait of HM Queen Elizabeth II right, wearing the Girls of Great Britain and Ireland tiara, legend around |
| Obverse script | Latin |
| Obverse lettering | ELIZABETH·II·D·G REG·F·D·2011
IRB (Translation: Elizabeth the Second by the Grace of God Queen Defender of the Faith) |
| Reverse description | A diagrammatic explanation of the offside rule in football, London 2012 logo above, denomination below. |
| Reverse script | Latin |
| Reverse lettering | london 2012 OFFSIDE EXPLAINED OFFSIDE▲ ▲NOT OFFSIDE 50 PENCE |
| Edge | Plain |
| Mint | |
| Mintage | 2011 - Proof - 1 |
| Catalog ID | 6261962000 |
| Comments |
