That would explain the 3 bangs a few months ago just before the pavement melted outside my front gate. I am probably the first on the supply to the surrounding streets as the substation is in my back garden. When the workmen turned up to do the repair work they changed my phase supply so I could have power to boil my kettle for them. I asked them about backfeeding and they said that the nearest substation which is less than half a mile away was already backfeeding most of the village and there were only about 12 houses actually been fed from the substation in the garden on the red phase.
Adam