If you are getting an electrician in (you obviously need to) ask which Competent Person Scheme he is in, and how long he has been a member (you can check on their website) before making an appointment.
Opinions differ, but IMO in kitchens it is best to have plenty of switched sockets every metre along the wall 150mm above the worktop, and at every position where you have, would like, or one day might possibly consider having, an undercounter appliance, put a 20A DP switch feeding an unswitched 13A socket, under the counter, behind where the appliance will go. The switches can have indicator neons if you want, and can be labelled with the appliance name if you feel like it.
Dishwashers are unusual; they are made so big that there is often no room for a plug behind them. In that case it is possible to use a flex outlet, and have a switched fused spur above the worktop. This is less convenient because you can't just pull out the appliance and unplug it.
The fact that the fused plug is behind the appliance is of no consequence, because appliance fuses blow approximately zero times per hundred years, and when they do the appliance usually has to come out to be repaired or scrapped.