Well the engineer arrived.
Replaced the broken valve body.
This valve has been upgraded to more metal parts.
Depending on what the engineer and his supervisor 'diagnose' there's a chance a replacement boiler may be the cheaper option against continual repairs.
I have had a 'contract' for repairs via homeserve on my Glow worm combi boiler.
The boiler is 30ci model.
The house is my Grandmothers. I am caretaking the house while she is in care home and soon to be hospice.
I have been told that build quality isnt its strongest as they were...