What is bangers and mash and how is it traditionally prepared?

Bangers and MASH is a traditional British dish consisting of sausages and mashed potatoes. The sausages are usually made of pork or beef and are served with a side of creamy mashed potatoes. The sausages are typically pan-fried or grilled, and the mashed potatoes are made by boiling and mashing potatoes with butter and milk. The dish is often served with onion gravy.