a decent tool wholesaler, will be able to sell you stainless steel tap cutter.
basically drill a hole in the sink in 13mm exactly in the centre of your reqd tap position, then you place half the tool underneath the sink, the other half on top place a bolt through the top piece ( unthreaded ) which will then pass through the sink and thread onto the cutting piece below the sink. tighten by hand, then get your ratchet out and tighten bolt. the bottom cutter is pulled through the sink and you have a lovely clean hole!! it has never failed me on a sink in 15years.
by the way if any of my clients provide stuff from b+q to fit, id ask them nicely. to ask b+q to come fit it.
forget, all the above. sorry im a plonker. didnt read the post correctly. stainless steel, and ceramic. wot an idiot.
sorry again.
good luck