help! the baby will need a bath!?

i have a sime friendly. the central heating works. the hot water doesnt. the pilot light is on but when i turn the hot tap on nothing happens. it has been like this since a friend fitted a new radiator for us but he says that it is nothing to do with that. I dont know another plumber and if i resort to yellow pages i could be ripped off big time. the baby is due in 3 weeks. help!