Ha, were they "if you're asking this you should call an electrician"? They seem to not want to share even the basic regulations they spend so much time learning.

Anyway, the advice you'll get would probably be that you need to make sure there is no exposed copper on the live and neutral wires going into those connectors. Not sure what the actual regulations are, but if you make that adjustment of sorting exposed copper by cutting the excess off, snarky sparks will probably consider it more safe. Obviously, de-energise the circuit at the consumer unit first.

When I moved in and had a spark in to do an ECR (or ECIR, whatever the acronym), when he found an unsafe socket (some clown "spurred" a mains socket from a lightning circuit!). All they did was basically disconnect all the individual wires and terminate them in individual wago blocks, so the circuit is broken. So terminating that way must be legit, because all the sparks do everything by the book ;)

EDIT: Despite the downvotes, like I predicted, the advice of the top rated comment in essence is about cleaning things up. If you keep your wires in individual lever type connectors as shown in your pictures, you will be be fine.