I think this is a similar idea...
You can buy 'clean earth' power sockets that are standard 13A sockets but have a dedicated earth supply that is driven from a seperate circuit. It would probably need professional installation due to the new electrical regulations although TBH, a decent electricial would probably provide good advice on how to provide a safe and clean dedicated earth either from the switch board or from an alternative source.
www.screwfix.com and do a search for 'clean earth' returns 'clipsal 2G Surge + Clean Earth Skt'. I have this unit, it is not necessary to make use of the surge filter if you do not wish to. In the end I didn't bother with a dedicated clean earch circuit and just bridged the earth and clean earth connectors to provide a standard socket but with with a surge protection filter.
There is more information about 'clean earth' circuits available on the web.
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