Wikipedia
Snorkers is a British English colloquialism for sausages . The reference is probably to the resemblance between a sausage and a snorkel. It may have a Royal Navy slang origin.
Snorkers is the nickname for Palethorpe's pre-cooked tinned sausages. The nickname originated aboard World War II Royal Navy submarines, along with other culinary delights such as HITS (tinned Herrings In Tomato Sauce) and Baby's Heads (tinned steak and kidney pudding). Fresh food lasted only a few days aboard submarines so nearly everything was tinned.
Snorkers are mentioned in Nicholas Monsarrat's novel The Cruel Sea as the favourite food of Lieutenant James Bennett, RNVR. Bennett is described as Australian, and the snorkers references attributed to him alone, which suggests a possible antipodean derivation of the word.
Terry Wogan often referred with relish to snorkers, a welcome part of the culinary delights (sometimes) served up for Sir Terry and his "team" on the BBC Radio 2 breakfast show.