The Unipower GT. Built mid 60's and a pretty successful Mini Cooper powered racer.
Full details on the club website here. From the prices on the for sale page they are still very desirable for historic racing.
Unipower GT | Owners Club & Register founded in 1972 | England
Rochdale Olympic - fibreglass monocoque with a front subframe bonded in to carry the suspension and plates bonded into the rear floor to help carry the rear suspension designed by Richard Parker who had worked on the design of the Climax engined Lotus Elite.
Initial production version the Phase 1 launched around 1959 had Morris Minor based front suspension and usually a BMC A series engine although at least one was Coventry Climax powered.
The later phase 2 had Triumph Spitfire based front suspension and a Ford 1500cc pre crossflow engine as well as an opening rear hatch.
The photo shows the most famous competition Olympic campaigned very successfully by John Anstice Brown which still survives. This Olympic was a Phase One lightweight which basically meant that they used fewer layer of fibreglass to make the shell but the price for a lightweight shell was higher than for a standard shell !
Club Website with full details
Rochdale Owners' Club: Olympic
If you hover over the History tab you will find details of other road and competition cars built by Rochdale Motor Panels.