Originally Posted by
Analise
Thanks! I might have to do that!
I reached out to a GWR rep on FB messenger. He gave me a link to request assistance 24 hours in advance. He said that if my flight is delayed or I'm delayed at immigration and miss that train, I can ask an agent at the Heathrow Connect ticket window area to contact Ealing Broadway for me to notify them of my delay and which train I'll be on. I would assume the agent would tell me which car to board so they can locate me quickly.
While it's great that they've offered that service, I'd urge you to double-check the communication, as assistance is normally only offered to passengers with a disability, or older passengers:
https://www.gwr.com/plan-journey/journey-information/assisted-travel
Assistance is generally on both ends of the journey, and you'd be seated next to the accessible toilet on the train - the assistant at the arrival station will know to wait at this point (there's usually manual ramp available to them there as well).
If they're offering it in your case, that's great. I'd look for the wheelchair symbol on the outside of the train (this will be the area on the train with a wheelchair space and an accessible toilet) and board there. I can't remember whether Heathrow has a platform hump or a folded boarding ramp against the wall at that point, but I'm sure you can find someone on the platform to ask (be sure to specify it's for a Connect train, though...)