Slitinto NX-SM112 Power Monitoring Plug
There seems to be a couple versions of these. Same model number but different internals. If the above does not work, an alternative template is:
These are a smaller form factor plug which do not foul the switch on UK sockets.
Also sold under various other brand names, including Jules V and Bakibo.
Be cautious when puchasing as there are some versions which look identical but do not come with energy monitoring.
Comes with TLS firmware but flashable with the latest tuya-convert.