Heathrow , London

I haven’t been to Heathrow in a while but a quick look at the terminal 5 map on Heathrow.com shows escalators to level 2 and 3.

Terminal 5 is the newest and nicest terminal at LHR so you should be fine.

Its a lovely terminal and yes there are escalators.
https://m.youtube.com/watch?v=YhiDIBE9qLM

To see pictures of the interior of the Terminal use your web browser and type in Heathrow Terminal 5 images.

since the lift even has windows, could you maybe even try that? Whichever way you manage, I'm sure you'll be fine... welcome to England

As I recall, there is a stairway between levels right next to the elevators. The stairway is open and light.

Nigel, unfortunately even a lift with windows is something I cannot do. Totally illogical I know.
I wish I could do better. But thank you for your reply

If it helps any, the lifts can hold about 20-25 people and you will be in it for less than a minute.

If not there are alternatives to the lift.

If you don't mind me asking, how do you manage a long plane flight?

I don,t have an answer to being able to do the long flight. I only know that claustrophobia is very illogical
And very debilitating. Lifts, MRI,s and small rooms are impossible. Over the years I have tried very hard to beat it. It goes against who I am?

Thanks.....I have a friend who is also claustrophobic but wants to travel. He just can't fathom the idea of sitting in a plane for hours at a time. I thought you might have a secret or two.......

have you tried slowly exposing yourself for short periods of time? then gradually increasing time and decreasing size?

I cannot even step into a lift, let alone stand there for more than a second. Ha ha. I think I need help
Regarding the flight, wish I had some answers for your friend. The only problem I have is waiting in a line to get off, so I bury myself in a book , trembling until everyone has gone. I am 79yrs of age and need to get over it

Rather than picking it up at T5, pick it up at the Avis facility on Heathrow Airport T2-4 Central Heathrow Loc, Northrop Rd. It may take a little longer, but you could avoid the lift.

Could I walk to T 2-4 or would I need the shuttle

You’d need to take a shuttle. Unlike T5, that facility isn’t right at the terminal.