Thanks to responses from all repaired the leak. Get hot water from the gas side but not from the electric. Indicator light is lit. Has any one any ideas.
Thanks all it was the reset - doh !Bob, its going to be one of 2 things.
First, it may be the thermal cut out has operated, and needs to be re set.there is a reset button in the center of the electrical connection on the rear of the heater, under a cover flap, coloured red, try pressing it and see if the water heats up.
Second, it is the element has gone, and needs replacing.