Now you have explained it a bit more, yours and his actions are perfectly correct.The only work I did was to supply the fitting, and measure and drill the hole in the ceiling - the electrician seemed happy with this, and it was him who actually put the fitting in the hole and connected up to the circuit.
You must already have an RCD protecting your lighting circuit.Thinking about it, he thought he would have to change something in the CU as well (add an RCBO?), but when he checked, the circuit was adequately protected, so this wasn't necessary.
No that is the correct certificate - not sure what the wording for NICEIC is but they will have informed BC and the certificate is to confirm that the work complies with the Building Regulations and should be kept in a safe place. On some local authority BC websites you can type in your house address and it will state what Building Notices have been completed relating to your address.The certificate I recieved came through the post a few weeks after the work was done, - it was issued by NICEIC, and posted directly from them - I haven't recieved anything from BC, - should I have done?