Thanks @BrownTiger !
I see that the object you sent is treated as an electrical object, however it seems to behave more like a switch than an outlet (the attached picture shows the cursor changing to switch symbol when placing a new UK outlet and a UK outlet previously placed on the wall automatically at switch height). I also noticed that the symbol in the plan view seems to be reverse orientation from the built-in standard outlet (i.e. the lines on the symbol face the room instead of the wall).
I tried making these tweaks myself, but do not see options to do this.
Are you able to make these tweaks or tell me how to do it myself?
Cheers!