High-pitched buzzing sound/noise with Apple Studio Display

I'm experiencing a very annoying high-pitched buzzing sound with my Studio Display, I've spoken to others on Twitter who also have the problem and I've had Apple support on the case but nothing was resolved.

Here's what I know:

• It's not the fans, it's a distinct (and very annoying) sound that emanates from the rear area of the display, roughly where the power supply is positioned.
• It only happens when my MBP (M1) or iPad Pro are plugged in to the display.
• Plugins the MBP into a charger and the display doesn't help.
• It's not the power extension, I've tried a power line conditioner and every power socket in the house (regarding power, I'm in the UK) without success.
• I've tried unplugging everything else in the house to rule out line interference.
• This is my second display, Apple support actually advised not returning this one because it's unlikely I've had two faulty units.
• Here's the weird one… the noise more often than not stops in the evening, roughly around about 7pm. No annoying noise after that 🤔
• I have an electric car with a charger built into the house power supply, when the car is plugged in and charging the Studio Display's noise becomes excruciatingly high pitched and loud. Due to this I charge the car over night these days.

Here's a video of the sound, it's hard to pick up so you may need headphones. Ignore the background noise, the high pitched tone should be audible. In real life it's much more obvious and very annoying.

The only thing I've not managed to try is using it at another property.

I'm 90% certain the display is picking up interference from somewhere and amplifying it, maybe through the house power circuit but I can't be sure. Someone I spoke to believes the PSU is poorly shielded but I have no idea if that's true either.

I've been trying to pin down the cause of the possible interference but so far no luck. I have a feeling it may be coming from a neighbour or somewhere outside of my property due to the fact the noise stops in the evening, maybe a neighbour is switching off whatever is causing the issue?

I'm posting this here in case anyone else is experiencing the same issue because it's incredibly frustrating.