That was the councils first excuse..... They used google street view whilst on the phone to me and said that the style of brick work indicates that the wall is solid.
So I made a point of finely putting the outside lights up I had been meaning to do and in doing so I had to drill thought the wall, and what did I find..........a cavity!!!
The side and rear walls of our property are defiantly cavity, and I suspect the front is too but don't know for sure.
What makes me think it is is the fact that either side of the house, low level just above the ground are to old air bricks, shy would you gave air bricks in a solid wall? They aren't brood the ground floor level plus it's a solid floor in the house so no ventilation under floor boarRAB either.