None of the UK Area Control Centres have weather radar overlays that I am aware of.
En route surveillance radars don't lend themselves to detecting weather due to the wavelength they transmit on, or is it the frequency ?? .... it's 25+ years since my Radar Theory course in my defence
. In any case, the display of weather at the controller's console would be generally pretty poor at showing anything relevant in the ACCs as the radar pictures are all processed to remove any clutter and to smooth target tracks.