It's an aluminium front end with a steel back end - you can tell by the welds.
I dont recognise the brand though, possibly not a UK market model I dont think its a raleigh - they tended to bond the head tube if they bonded the back end.
Giant did do bonds that looked similar, but again that head tube looks unfamiliar.
Given the fittings and style, my guess would be 93 - trying to get in on the aluminium lightweight boom, but overcome that material's reputation for easy chain damage and fatigue failure in the rear triangle.
A closeup of the seat cluster and bb area might bring out a marque Enthusiast?