I would recommend using a good quality white sealant. apply masking tape around the socket leaving approx 2 mm gap on the socket and tiles. force sealant into the gap with mastic gun. use your finger and neatly smooth excess silicone off. remove tape, then very lightly with a wet finger or thumb, smooth again. should leave a very neat finish with the gaps filled in. other option is to use a oscillating multi tool with tile attachment. mark around socket with sharpie pen. remove socket, cut tiles with oscillating tool, then refit and sink sockets in and apply grout.
Would you like a quote from this tradesman?
Invite this tradesman to quote for your job & get a fast response.
Other tradesmen may signal their interest as well.