Is this a rented flat or do you own it ?
If rented then the landlord is the person to speak to about having the place re-wired as required. I would STRONGLY suggest the consumer unit be moved into the flat so that power can be rapidly turned off in the event of an emergency.
If this is a house converted in flats then it is hard to believe the local council were in agreement with the consumer unit not being in the flat.
I would delay fitting the new lamp until the problem with the earthing is resolved.
If rented then the landlord is the person to speak to about having the place re-wired as required. I would STRONGLY suggest the consumer unit be moved into the flat so that power can be rapidly turned off in the event of an emergency.
If this is a house converted in flats then it is hard to believe the local council were in agreement with the consumer unit not being in the flat.
I would delay fitting the new lamp until the problem with the earthing is resolved.