Photo of a very badly overheated UK 3 pin mains socket. One of the sockets holes is burned to a crisp and mis-shapen and a large crack runs from the top-left corner down through the earth hole and between the live & neutral to the bottom.
https://media.mastodon.scot/mastodon-scot-public/media_attachments/files/111/986/265/283/913/504/original/ede454dbbb152a45.jpg