The London 1980 International Stamp Exhibition was an international stamp exhibition held under FIP (Fédération Internationale de Philatélie) patronage.
A 50p stamp and miniature sheet, both depicting London landmarks, were issued on 9 April to publicise the exhibition (S.G. 1118/1119).
They were designed by Jeffrey Matthews and printed by Harrison and Sons using the line engraving process.
Previous stamp issues promoting the exhibition included the 1978 Historic Buildings and the 1979 Sir Rowland Hill miniature sheets (S.G. 1058 and 1099).
Visitors to the exhibition were able to obtain special handstamp cancellations for first day covers and other items.