my gas hob trips an unrelated RCD?

hi there is short cricuit in ignition hob. But why are you trying to unplugging Boiler????
you can check the Power(live- Nutural_earth) by moltimeter

good luck

Heat Plus LTD
August 2009

Unable to decipher the true meaning of...

"As soon as I make contact between the gas hob ignition plug to the circuit (earth pin)"

But no matter - you need an electrician - some quality bonding may be called for - and if the "I make contact" means you actually touching something - with your hands - then you may be in danger - stop making contact immediately and isolate the hob.

Take care...

Peccavi
August 2009