UK LED lights tripping rcd

[Trisha]

Builders say no issue in garage where they have stripped the walls but after 9 years rcd tripping only when downstairs lights are on , feeling lost and scared. When it trips the dstair light switch does not fall only rcd

 

[westward10]

How old is the house wiring and has your consumer unit (fuse box) been replaced. I suspect most people on here like me are thinking crossed neutrals on the up and downstairs lights not uncommon back in the 70s.

 

[buzzlightyear]

It's best to get a spark in and investagate
Having Charlie crolloly gang of builders in
They would have damage some thing.