We are checking the meter numbers and they seem to be going up without us
doing anything. There are no dripping taps, so it may be in the pipes
somewhere.

We rang the Water Board and they said to get a private plumber to check it.

My question - has anyone else had this problem, and would the plumber have
to dig up all the concrete to get to the pipes? :-(

Is there an easier way for him to check for leaks?

Thanks for any suggestions.
Katherine