Mine's going back to P4U tomorrow for a straight swap. I swear the flickering problem is getting worse.
For anyone who wants to check if they've got it, make sure you're on auto brightness or full brightness, go to the battery use screen daz has screenshotted above and press on the graph. This will open out into a full page graph of mainly grey. On my screen said grey is strobing like an old CRT.
Tried that with mine and everything is fine.. thankfully