Something odd that my research has turned up is that for some reason 40Cdo got made to leave their SLRs in Cyprus and take No4s to the canal. 

Source: [RMMGS 51:Suez 1956  (Royal Marines Museum)](http://www.royalmarinesmuseum.co.uk/item/researching-family-and-royal-marine-history/rmmgs-51suez-1956)