I think I may have found the holy grail:
The magic word is "SANSI". They mostly molish studio lighting and grow-lamps. They mention both CRI *and* flicker in their specifications.
AvE mentioned them in a recent vijaho as he needed fucking bright flicker-free lighting for filming in slow-motion. "Bet you can't get those in a 240-vole flavour." thought I. I was wrong:
https://www.amazon.co.uk/gp/product/B082W4923MI have one of these in my hand. It oozes quality. Well-ventilated switched-mode power supply visible inside the main body of the lamp, with a heavy ceramic heatsink above with the LEDs around the outside. This means the light shines sideways in all directions rather than predominantly out the end, which is more useful in most fixtures.
Powered it up, and, well, do not look into 4000lm source with your remaining eye. Got the flicker-o-meter out, and while it's surprisingly difficult to operate an oscilloscope when you're half-blinded, with careful knob-twiddling I was eventually able to trigger on the merest hint of perfectly sinusoidal ripple. At 70kHz. You can tell it's well-smoothed by the way it takes a couple of seconds for the LEDs to extinguish after you switch it offf. Passes the barakta test with flying colours
[1].
Sure, it's only available in E27 cap. Use a dongle. It's worth it.
Now installed in our kitchen, replacing the 30W CFL with the 10% 100Hz ripple. I had to filch a shade from another room, because it's so bright.
Job Fucking Done.
I've now ordered some of the 2000lm ones. The 4000lm is strictly for kitchens with landlord-quality lighting design
[2] and as a main room light for hoovering and when you want to find dropped ball bearings on a mottled grey carpet.
[1] The flying colours are orange and purple, in the shape of a ring of LEDs, as seared onto your retinas.
[2] Single pendant, so you're always washing up / chopping in your own shadow.