In reply to wilkesley:
As the thread I started has been archived and I can no longer reply I'll add my thoughts here.
I never got a reply from Inov8 and as a result they can say goodbye to my business.
Sports Pursuit were pretty helpful and gave me a full refund.
Genuinely shocked by how poor the shoes have been. It is clearly and error in design and materials. The overlays split because they are not robust enough and Inov8's thin flat laces create a sawing effect on the eyelet. Not impressive.
Based on the advice given I decided to give the Speedcross 4 a go. I went half a size up as they are a little narrow for my trotters.
I've only been on 4 runs with them so far but after 30+ miles I can say that the grip off road is great and the shoes feel very robust. They are stiffer and heavier than the Inov8s but I can live with that.
The only downside I am seeing is that the grip is terrible on damp tarmac. I may be the same on rock as well.
Good luck.