OP
Tafia
You appear to be worried about rocking the boat. Is that likely to have some bad consequences for you?
and don't you want to drop the spark in it? If he has done the job properly he will be easily able to prove it, if he hasn't then he deserves what he gets.
Personally I would forget being nice and start rattling a few cages- I would put your concerns in writing to the council, including the fact you have evidence (lifting the turf) that this has not been done properly. In that letter I would point out you are concerned that this could cause a danger to anyone doing further work and whoever ordered the work could become liable if an accident or fatality occurs. I'd also copy the church authorities.
Mention of accidents and death and liability might just be enough for someone to realise they can't just ignore it. You might upset a few people but better than some contractor getting killed!
Re digging up the turf; could that be seen as interference with an electrical installation given that it was just soil that was moved by me to expose the cable?
Would this spark be in bother with the NIC if they found out what he had done? He is registered with them.
Thanks again.
T