I want to have an extra socket in a utility room. The easiest way to
route the cable would be horizontally from an existing socket, then
neatly around the door frame, to the place where I want it. The room
has a solid floor and a solid ceiling. If I route the cable around the
door frame, as mentioned, has it got to be in trunking? I think it
would be neater without.

Thank you...

Rich