We were somewhere around Barstow, on the edge of the desert, when the
drugs began to take hold. I remember google
saying something like:

My flat does not have any mains earth supplied to my meter from
outside, by the power/network supplier. Flat is a traditional 1884
Scottish stone-built tenement building, 2nd floor.

I'm afraid the usual option of banging in an earth spike is not open to
you, unless you have very understanding neighbours below.