Lobster wrote:

What do you define as 'real earth' - are you refering to the incoming cable
sheath? Or an earth rod somewhere (which would be difficult as there's no
'soft' ground anywhere nearby.

From the photos it looks as if there _might_ be an earth connection
made to the sheath of the supply cable - i.e. a TN-S earth. Now that
the gas meter is out of the way can you post a photo showing the supply
head - basically the same as 2.jpg but without the gas meter.

Other points:

- there appears no main bonding conductor to the gas service. Add this
once the Corgi man has done his bit. It needs to be 10mm^2 and goes
between the gas pipe on your side of the meter and the main earth
terminal; ditto for water if main bonding is missing;

- clean everything up;

- replace the fuse cover on the Wylex CU.

--
Andy