WIFI devices in a metal consumer unit.

[Strangehead]

Good morning. I intend to replace my oil boiler with electric and a qualified electrician will be doing the job. I see there are lots of din rail mounted WIFI devices such as meters, switches, timers etc and I am considering asking the electrician to incorporate such devices within the new consumer unit feeding the boiler, immersions and controls. This is for 'smart home' remote monitoring and interest in energy consumption purposes.
Anyone had experience of these devices within a metal consumer unit where the WIFI signal may be proved ineffective due to the metal enclosure? I appreciate strength of WIFI signal may come into play here.
I assume a plastic enclosure is not allowed. Thank you.

This is so frustrating obviously these manufacturers are not aware of our incredibly tight electrical regulations. I install intruder alarm systems which have steel enclosures and the manufacturers have included a fly lead with an aerial to ensure that WiFi signals are able to penetrate the case via the cable.
It’s a pity that the manufacturers of these consumer based WIFI units do not accommodate this facility.
I wish you luck.