Nope, dont know anyone at LHR who has either. When they come in the park up at remote stands. Have driven up there a few times to try and get a closer look but security is too tight and you can get no where near.
I've seen them at LAX at times when I was working with F9. I actually got close enough to snapped a few pics of them, because I knew from research HM6 is the 249th Tristar & HM5 is the 250th and last Tristar built. Regards.
"Beer is living proof that God loves us and wants us to be happy." --Ben Franklin