hi lamma and rory32, here is the response I have received from my County council highways regualtions department.
"The dropped kerb area is still public highway, and as such the public have a right to pass and repass (basically you should not be parking on the crossover) but you have the right to cross from the carriageway to your property via the legally constructed access.
It is against the law to block a legally constructed dropped kerb access to a property.
The Police have power of enforcement, and you are within your rights to call the Police if someone has parked in such a way as to prevent you access or egress (the right of a person to leave a property in property law ) at your property. The Police have the power to request the vehicle be removed, or to remove the vehicle.
The only time you would not have support of enforcement is if you were crossing the public highway illegally (bumping the kerb, driving over verge, driving over footway) to gain access to your property. If this were the case and someone parked where you illegally cross, then the Police could not be involved because you would be the one acting unlawfully, not the person parking outside the property. "
So... whilst the public have a right to walk over the dropped kerb bit that forms part of the pavement, (which is what you would expect) it is illegal to block my access and exit ( as I have a legally constructed dropped kerb under licence) So whilst I hope it will not be necessary to involve the police at least I know that I can! and I havent wasted all that money by having the dropped kerb put in.
Thank you all for your help.