Baxi combi 105HE Hot Water Problem?

I have a Baxi combi 105HE boiler. The hot water has stopped working. I put the taps on and its just cold. I cant hear the boiler sparking into life and the green tap light is out. There are no fault indicators flashing and the radiators are working fine around the house. Just seems to be a problem with the hot water. Can anyone help me, Id be very grateful as I have 2 kids who need a bath!!