Thanks, yes it is frustrating. They have had a verbal yes, but in order to get it in writing they need to apply for permission, which takes 8 weeks.
They mentioned it when they viewed in Sept, they asked if I had had planning refused. I said no as had never gone for planning. They could have applied or asked me to at that point, and didn't... That is what is the most annoying thing to me about it all. There is a precedent in that most other houses have it in my road, all in the vicinity, so it would be allowed likely on that basis for the entrance to my drive (rather than the full width)
I am going to see if I can exchange with just them on the basis they can pull out if planning is not allowed, as I am so sure it will be. It gives me some protection that they won't pull any stunts further down the road.
I have also offered to reduce the price by £2k if they exchange by a certain date. That would then more than pay for the kerb to be done for them too...
Fingers crossed we can either tie them into the purchase or they decide to go with the lower amount to move quickly.