Earth Bonding
I'm assuming that the 'change' is due to Virgin Media upgrading the network from FTTC (Fibre to the Cabinet) to FTTH (Fibre to the Home).
Copper phone wires supplying a home do have an earth reference point at the cabinet. That's the 1-metre high box along the street somewhere. But that earth isn't to provide safety for end users if you send mains 240v or a lightning strike down the wires! The copper is too thin to take that sort of current.
The earth reference acts to protect the equipment owned by OpenReach or whoever your supplier is.
Once the cable to the house is upgraded to fibre optic, it can no longer have any earth reference.
Your link now uses photons, not electrons!
Nor can it provide the 80v across the pair of copper wires which produces the 'ring tone'.
So two things have to be changed in the home.
1: Your broadband router gets changed to one with a fibre-optic link to the outside world.
2: Your 'landline phone' needs to receive power from the house electricity supply.
The latter is more complex than it first appears.
The telecomms regulations require that it must be possible to make a call from the house during a power-cut.
So the new phone also has a battery which keeps it 'live'.
None of this has any bearing on the earthing for the house.
If anything, it makes the situation simpler.
In the event of a nearby lightning strike, you no longer have a copper telephone wire connecting into the home.
The only earth which concerns you will therefore be the one associated with the mains electricity supply.
Save energy... recycle electrons!
@transparent We are awaiting a call back from Virgin on the ridiculous as we have 3 handsets that will need powering (special equipment for hearing impaired user etc.) which in turn entails occupying a 13 amp socket and trailing wires. VM point out they will not work in a power cut so we will be requesting one of their equipments that connect to the hub but provide a connection at all times to cover us for emergencies. They are not aware that we have islanding powering -with apologies, in case anyone is interested, this is the gist of the VM message: Regards, Toodles.
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Toodles, he heats his home with cold draughts and cooks his food with magnets.
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