So, after totalling my Boardman Red Bike (no idea of the model, but it had an alu frame and Sora gear) I have treated myself to something much less practical...
It is a Merida Warp (4?) That is about 5 years old: Shimano 105 all round and some silly carbon tubs. Not bad for a commuter...
The man Dan at Greenwheels Cycles in Peterborough was very helpful and set it all up for me, too (Not quite a bike fit, but close). Look forward to getting soaked in this over the coming months. And fitting mudguards.