You could light a runway at Heathrow with 4500 W of LEDs!

What does "flickering on and off" mean please? Does it mean that if the LEDs are on, the hob spontaneously turns itself on then off, etc? Or if the hob is already on, does it turn itself off and back on etc? What is flickering? Is it the hot plate or the controls?

That you could! It’s lighting up a big open air arena for horses.

It’s the controls that’s flicking on and off when 6 or more of the lights in the arena are on. When the hob is turned off by the touch controls, not in use, they flick on and off and sort of sounds like it’s triggering a relay.

It’s also playing funny with the tv in the living room too which is on a seperate circuit, when tv is on mute there’s noise through the speakers, like a noise you’d get with a grounding issue.

I have videos of the above I’ve tried to attach to the post, 

cheers 

Have you measured the voltage at the hob?  I wonder if it's dropping below 217V and causing the hob to malfunction.

Alternatively, if they are cheap LED lamps, the power factor may be terrible, and the resulting mains is only vaguely approximating to a sine wave.  That could cause problems with the hob's internal ELV power supply, in turn causing the microcontroller to keep resetting.

Thanks for the reply and the suggestions! I haven’t done any testing or nothing on it, going to have a look at it after the weekend! Will check a few things, the lights were bought from a company on Amazon, they could easily be cheap ones. 

Is there any sort of EMC filtering in the line to the lights ? - Note that the reference levels of what is permitted  when CE marking,  in terms of  how much high frequency crap you can inject into the mains were set based on one unit interfering with victim equipment in a neighbouring property. (mil spec standards are in most cases at least 20dB tighter, but that would make stuff more expensive)

It does mean that you can not guarantee that co-siting of interference source and victim will always work, nor does it consider the possibility of multiple potential interference sources in parallel.

You have both, I think.

Waving a medium wave or long wave (AM) radio near the wiring (any part of it not in earthed armour or steel conduit)when the LEDS are on and seeing if there are noise like radio signals that stop when the lights are switched off is a quick way of deciding if that is a possibility.

But do check the voltage drops first, not least because it is easier.

Mike.