The shocks will not be just down to an an NE short on its own.
Something else also has to be wrong, and indeed that needed investigation - and may well have been a broken CPC to boiler or sockets given your description of the fault found and the symptoms. I presume a MET wanderlead R2 reading or a voltage test MET to the plumbing would also have shown up a problem - it does suggest the previous sparks were at best slipshod, if not dangerously negligent.
The shocks will not be just down to an an NE short on its own.
Something else also has to be wrong, and indeed that needed investigation - and may well have been a broken CPC to boiler or sockets given your description of the fault found and the symptoms. I presume a MET wanderlead R2 reading or a voltage test MET to the plumbing would also have shown up a problem - it does suggest the previous sparks were at best slipshod, if not dangerously negligent.
