My boiler loses pressure daily. It was suggested that there might be a leak somewhere but i'm pretty sure there isn't. There is no evidence of water anywhere. It seemed to be working ok with a regular top up of the pressure. However, not sure if this is related but the water pressure from the shower is very low. If you turn the tap on high then the water is cold. If you turn it on slightly then its hot but it's getting so you barely turn the tap on to get hot water.
Can anyone suggest anything please?

Are we talking about a hot water heating system or a water heater?
regards, Tom

It is a combi boiler....Not sure if this answers the question. The water heats up when the tap is turned on. I don't have a hot water tank. So not sure the boiler is at fault
Thanks

Sorry, I can't try to begin to know why this is happening, it sounds like you need a good service company to look at it. I think you have 2 problems, but again, I'd hate to guess.