By definition 'bangers 'n' mash' is a dish made with cooked sausages served with boiled then mashed potatoes (not to be confused with Toad-In-The-Hole which is an entirely different dish made with sausages and Yorkshire Pudding batter).
(ed: Bangers and mash is often served up with boiled cabbage or mushy peas and lashings of scrummy gravy - aww... why did I have to grow up?)
Anyway, this traditional British dish was made world famous back in the 1960's by an unlikely hit record created and sung by comedian Peter Sellars and (of all people) the then sex-pot Sophia Loren! The 'rough' history is that the two had embarked on a torrid affair during the making of a film called 'The Millionairess' in which Sellars played a pre-PC role as a Doctor of Indian origin.
Somehow Sellars persuaded Loren to 'sing' along with him on a record spawned from the film (but not a part of it as I remember) called "Goodness Gracious Me". This was a hit, and they followed it up with "Bangers and Mash".
Shortly afterwards they went their seperate ways, and Loren for one, made no other forays into the world of music, though Sellers did including a 'spoken' version of the Beatles "Hard Day's Night".
Many thanks to Tony Fahey who provided the lyrics (below).
Bangers and Mash: as performed by Peter Sellars and Sophia Loren:
Him: I met her down in Napoli and didn't she look great?
And so I brought her back to Blighty just to show me mates,
And though we're married happily I'll tell you furthermore
I haven't had a decent meal since 1944.
Her: Eat your minestrone, Joe.
Him: That's all you ever say.
Her: Eat your macaroni, Joe.
Him: Ever blinking day.
Her: No wonder you're so bony, Joe, and skinny as a rake.
Him: Well then, give us a bash at the bangers and mash me mother used to make.
Him: Bangers and mash,
Her: Minestrone,
Him: Bangers and mash,
Her: Macaroni,
Him: Give us a bash at the bangers and mash me mother used to make.
Her: Eat your tagliatelle, Joe.
Him: That's all I've heard for years.
Her: Eat your vermicelli, Joe.
Him: It's coming out me ears!
Her: You've got to fill your belly, Joe, Joe for heaven's sake!
Him: Well then, give us a bash at the bangers and mash me mother used to make.
Her: Well alright!
Him: Bangers and mash,
Her: Tagliatelle,
Him: Bangers and mash,
Her: Vermicelli,
Him: Give us a bash at the bangers and mash me mother used to make.
Reporter: [Spoken] 1943. Allied forces land in Italy.
Him: There's a smashing-looking bird over there, Bert. I think she's showing out there.
Bert: [Camp] Well why don't you chat her up, then?
Him: Right. Bon-gorno, sig-noreena there. Here, are you married?
Her: Drop-a dead-a.
Him: There you are, you can't have a fairer answer than that, can you?
Her: I met him back in Italy, so dashing and good-looking,
He wined me and he dined me every night.
He said I smiled so prettily and how he loved my cooking,
But since he's married me it seems he's lost his appetite.
Him: Eat-a your tagliatelle, Soph.
Her: That's all you ever say.
Him: Eat-a your vermicelli, Soph.
Her: Ooh! Every blooming day.
Him: You've-a got to fill your belly, Soph, Soph for heaven's sake!
Her: Well then, give us a bash at the bangers and mash your mother used to make.
Him: Bangers and-a mash,
Her: Minestrone,
Him: Bangers and-a mash,
Her: Macaroni,
Him: Give me a bash with (she laughs uncontrollably) the banger and the mash like the same one that your mother was — what are you laughing at now? Now, this is miserable, please!
Her: Joe?
Him: Yes?
Her: Why don't you belt up, or I'll give you a punch up the throat!
Him: Now she's-a tells me. Ha! Mamma mia!
(ed: I've not checked, but I've been told an MP3 of the song is available at this url http://www.geocities.com/Hollywood/Location/9273/mp3.html)