Per-Circuit Energy Monitoring for UK consumer unit

Does anyone have any recommendations for a system that can monitor all the circuits in my consumer unit?

I’ve found this:

Emporia Smart Home Energy Monitor with 8 50A Circuit Level Sensors

But I’m worried its designed for generously sized US electrical panels rather than my dinky consumer unit.

The other tricky bit is the consumer unit sticks out of the wall in the downstairs loo (got to love a new build) so theres no other power sockets and limited scope to attach something around the outside without spoiling the WAF…

The “standby” load of my house is higher than I would like it to be, and I’d like a more sophisticated way to track this down than turning off circuit breakers one by one!

Would Shelly EM work? You can monitor two circuits at a time and they are tiny.