On Friday, 17 March 2017 14:43:51 UTC, NY wrote:
Is a single socket block with 12 sockets in any way safer
than a 6-way with two 4-ways plugged into it?

I think so, because of earth loop impedance as Mr Rumm states. I made a 10-way block with 5 x double sockets and a plank.

Or sir may wish to spend £25 quid on a ready made one

http://cpc.farnell.com/brennenstuhl/...-3m/dp/PL14407

or less

http://cpc.farnell.com/pro-elec/2710...usb/dp/PL15128

Owain