By you, when you came here and said that "The electrical work will be done by the contractor so all signed off etc" but quite clearly indicated that you were attempting to design what the contractor would install etc.
This is the declaration on an Electrical Installation Certificate:
I being the person responsible for the design, construction, inspection & testing of the electrical installation (as indicated by my signature below), particulars of which are described above, having exercised reasonable skill and care when carrying out the design, construction, inspection & testing hereby CERTIFY that the said work for which I have been responsible is to the best of my knowledge and belief in accordance with BS 7671:2008, amended to 2011 except for the departures, if any, detailed as follows:
If you intend to present your electrician with a diagram and say "do this" then you are acting as the designer.