Continental ContiContactSport 5 are going on with same deal for fronts when they need changing. Sorry Al - they caught me on the hop and I am in Amsterdam tomorrow so made a quick decision. I have asked them to assure it is ok to mix pairs.
Thanks all
TB had a total nightmare with those. 
I very much doubt that their driving styles would be similar. Hooligan v Grandma.
(Will he ever learn
)
It was the sort of nightmare that made the car extremely unstable at surprisingly low speeds, even for grandma here.
Anyway, fingers crossed for, er, grandma.
Well....since I'm in this section, I might as well talk more shite.

If the car was so unstable at low speeds with a good propriety brand of tyre on, I would say the car was at fault, not the tyre. And, before you say it was ok with a different brand, that is still the car at fault. I have used contis on all of my cars for years, and I haven't always been the careful, considerate driver I am now. Never had any problems at all. In fact, the only car I've ever lost the arse end on was my omega, and that had nothing to do with the tyres.
Some may call it exciting, I call it unsafe.