Originally Posted by
Dave_C
Are they of the same design with separate carriages, or have they moved to a walkthrough design, thus offering more capacity that way as well?
I don't think a walkthrough design will be compatible with the security search carried out at T5A when the trains turn from landside to airside, as this is done one carriage at a time by a Heathrow staffer who badges the door shut once done. That being said they could probably find a way to make it work if they wanted to,