My usual suggestion to customers with random tripping (after belling out the wiring to make sure it was clear) was to unplug absolutely everything that could be unplugged and switch everything else that couldn't, things like cookers, showers, immersions, off, unless using them. Then once finished, unplug or switch off again.
I suggested leaving boilers, alarms systems and routers on.
This way, there would be a bare minimum of equipment attached to the circuit at any one time, making it easier to try and track down the culprit.