Thanks for the reply. We have only had the car 6 months but when I had the alignment checked the toe was out at the front and this was corrected.
One of the rears was also out but due to a seized bolt this was left, my plan is to replace both rear udjusting bolts and get the alignment done before the new tyres go on.
There is a place near me called the alignment centre and it will be going there as thats all they do so they have a few years experience. They should be able to keep things at the better end of the specification range.

The main reason for posting is I don't want to get the alignment done, fit a set of Michelin latitude sport 3's and then wear the edges out like on my Bridgestones with 4-5mm left on the tyres.
If this is still going to be the case I will save the £250 a set and get the Hankook ventus S1 evo's or Vedestein ultrac vorti's.