i fixed the leaks and.......yes the low pressure indicator is still on.
looks like a new pressure switch.
many thanks :D
p.s i thought my plumbing was ok for an electrician! :P
my boiler started leaking water from the cold water main inlet into the boiler(it's the water inlet shut off valve thats leaking) and the boiler light came on saying low system pressure.
i have checked all the electrics (as you do when your an electrician!)
went through the boiler manual but...