Hi i am really hoping someone can advise. Came home tonight on the hottest day of the year to find that we have no hot water at all and no water pressure upstairs. The cold kitchen sink tap is working fine but no hot water in kitchen, upstairs the hot taps don't work and the sink and bath cold tap are running very slowly with no pressure i cant get anything out of the shower at all. I would really appreciate people's advice on what i could try and suggestions of what could be wrong. I will get a plumber out pd needs be but would prefer to try and at least locate the issue first. Help please