Ha! Heathrow was one of the worst airports in terms of losing and mid-routing luggage decades ago already.
I’ll never forget desperately trying to get hold of my luggage while in New York for the first time in my life: My suitcase had been lost at Heathrow (of course!) and finally reached me about a week later via Dubai (which, coincidentally or not, had been the plane leaving Heathrow from the gate next to mine…). Looked perfectly fine from the outside but when
I opened it, it was full of bird feathers
To this day, I have no idea what exactly had happened…