Frame looks like a 'Cape Wrath' from the early '90's. I just bought one from 'Santahul' on this forum, has same lugwork and cable routing, same forks and similar 'hologram' type headset badge. Think mine said 'Made in Brigg' under the CB initials. The Reynold's sticker's in the same location too, reads '531 Magnum' Here's the spec sheet for '91 and a pic of mine as I bought it, ignore the horrible white lining on the lugwork, someone having a joke with emulsion paint. Have pics of my build in progress if you're interested.
Mine infact has a different fork, it's a 1 inch threaded. Also mine has Kalin bars, stem and post and full 1996 Altus gears/brakes. Also the head lugs on your's has 'pointy' bits in the front centre, whereas mine doesn't. Based on your headbadge sticker I'd say your's is probably about the same age (give or take a year or so). Also if I remember correctly, the BR-M650 is Shimano DX (correct me if I'm wrong), meaning your's is a higher end model.