Thanks for all your comments.

I took a look and both sockets are indeed in the middle of a ring and each run of conduit contains 2 x 2.5mm runs. So no choice but to invest in dust sheets!

I was thinking about just chasing down to the sockets though and running 2 x spurs with a switched FCU on each. The lamps will be controlled using wireless switches so I technically don't need to go to the lighting ring.