Leak from bottom of boiler??

[vonn]

Hi there I have a leak from my boiler :sweatdrop: (Biasi 24s) and it appears to be dropping pressure aswell.
I have watched it over a couple of days now and it appears to only drip whenever I run my hot water.
Any ideas......... I am getting worried I may need a new boiler?
I have a plumber who is very realiable, but I fear may not be very good sorry ( I don't want to offend) but after a few visits with regard to my boiler, he does alot of talking but hardly any work.:6:

Thanks in advance Vonn:bow:

 

[AWheating]

call another gas safe registered engineer, the leak could be a number of things.