Yours is slightly different. Smaller downtube and different dropouts. Also a slightly different initial curve in the chainstay (looking at your other pictures).
But basically the same frame.
Hello, I bought two bikes about two weeks ago, one being (which seemingly looked to be) a no name and a Minerva Star Lite with almost a complete XTR-M900 group on it. The no name had a mix of XTR and DX with some cheap Gripshifts and to my surprise it appeared to be a 1991 Rocky Mountain...
www.retrobike.co.uk
British Eagle Boss was already mentioned
and here a similar Bike called Miles (and Austrian or Czech resales brand)