I think , I do not know , its just a think , that I may have a leak in my
mains coming into my house. This think is based on a number of issues with a
dripping tap in the kitchen CW ( refitting washers and still taps drip a
couple of days later) and the fact that when I flushed the tap pipe I have
got gravel out on two occasions now, despite cleaning the tap system. Fixed
stop cock washer but still dripping ( again). There is a peculiar hiss (
only audible in the bathroom when the windows are open unfortunately).

So, really I dont know if I have a leak or not!
Anyone know how I can find out without digging up a 300 long x 20 wide (
yards) driveway ( best guess as to where the pipe in runs somewhere right
through the middle). There is no sign anywhere of water leaking as such.

Also have been told water board may be able to locate the leak if it exists
but does anyone know how much they are likely to charge me?

In general , anyone been here and had this problem?