TreaderSteve
Senior Retro Guru
Poor old thing, but 1 1/4" by the looks of it steerer piques interest. Orange? Fairly skinny rear stays. Hope etc stickers on it. What's the stem though - has a slanted top to it and distinctive look from the front? Steel forks...most of it looks low rent but you never know as I'm no Orange ally expert at all.
https://www.gumtree.com/p/bicycles/old-orange-men-s-mountain-bike/1481349021
https://www.gumtree.com/p/bicycles/old-orange-men-s-mountain-bike/1481349021