Thanks a million for all the replies and ideas.
The solution for the sink is to move it to a different position away from the sockets. The Forum has assisted us to look again and it turns out, there always was a better position for the Sink that was glaringly obvious once we looked. My wife says "thank you" for giving her a better and more convenient kitchen.
Regarding moving the cooker control unit and cooker outlet, the local electrician has looked at the wall and can carry out the work. He also saw the potential "sink" problem and is happy that the "wife approved" new position poses absolutely no problem, being well over an arms length away from the nearest sockets.
While here, he was able to make suggestions to move the extractor fan socket and built in fridge socket (completely forgot these).
All in all, a really satisfactory solution to the planning pitfalls.
I also spoke to the plumber and he said that the pipework can easily go in copper (he is always neat and takes a pride in his clean soldered joints).
A final question. Does anyone have a "magic" source of money to pay for this new kitchen?
The "wouldn't it be a good idea to do the kitchen up" all started on a rainy Sunday morning over coffee!!!!
Next time, I'll just bury my head in the Sunday papers and grunt!javascript:emoticon('
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regards, retiredbri