Interesting Routing on the way to Heathrow

In the lead up to UK airports re-opening last night, for some unknown reason I was wittering on about flight paths and made specific observations about Flight BA84 from Vancouver to Heathrow.

For the record, this image shows the merry dance that the flight made over the British Isles before becoming the first flight to land at Heathrow after 5 1/2 days.

The image is from flightradar24.com. Please click on the picture for a much larger version.