On Thu, 17 Jan 2019 07:25:21 -0800 (PST), Tricky Dicky
wrote:

If they have not done the wiring yet, simply take out the crap ones and fit the right sort, they probably will not notice it anyway. Even if the wiring is done replacing like for like is not notifiable so you can still do DIY.

That is exactly what I am planning to do. I am waiting for a
replacement socket from MK. I have bought a box with screws in the
front (also MK) which I hope will overcome all the fitting
difficulties and produce a neat job. .