Re: For the true Sinclair aficionado...
Camputers (builder of the ill-fated Lynx) was also headquartered on Bridge Street. It was related to Acorn in the sense that it was a spin-off from GW Design, a company that had provided some PCB design services for the Acorn Proton/BBC Micro.
There's also Jupiter Cantab - designers of thr Ace - but they were way out in Bar Hill, up the A14 (although that probablly didn't exist in those days)..
Allso worth a stop-off would be the Cambridge Science Park to see Cambridge Consultants, which once counted Clive Sinclair and Robert Maxwell as board members and was something of a nexus of early Cambridge micro companies.