We are in Cheshire so Essex is a bit far to go.  Thanks for the guide price.  The tyres are Davanti.  A new kid on the block being aggresively pushed by tyre fitters.  Imported by Oak tyres, a major distributor in the north west, who has hooked up with a chinese manufacturer, Sentury Tire, who they say have a state of the art robotic manufacturing plant.
I dont think the 'chinese' tyres are the problem, as the fronts were ok.  It looks like the alignment.