The person who ran this pipe from inside the building and buried it under the patio would be responsible for bonding it at that time................the new outside tap, and that is nothing to do with electrics so how could burying a copper pipe under the patio to a standpipe possibly change the safety of the electrical installation.?
You can only go by your test results at the time of Inspection & Test - you cannot allow for future modifications, whatever they may be.
Tell me something, Steptoe....
My central heating system is run in copper pipe with a number of plastic connectors/elbows on it.
Would you therefore bond each individual section of pipe back to the MET??
And Canoeboy........Are you related to him??? Get your head out from up his ****.
He hasn't made that many good comments FFS.