Now I always thought that No.2 would have taken No.6 from his cottage, across the square, across the street, and up the steps to the Green Dome. But apparently not. In the above picture isn't that No.2, with the butler pushing No.6 in a wheelchair? Next is an enlargement of that section of picture.
This has to be right, because the next shot we see is this one.
The short piece of film with the three crossing the central Piazza must have been filmed for 'Once Upon A Time,' although perhaps only two out of the three figures are correct, as Leo McKern never went to Portmeirion during the filming of 'the Prisoner.' In fact that might also not be Angelo Muscat, or Patrick McGoohan for that matter in that shot. What does matter is that the representation by possibly three other individuals filmed in long shot is complete, and works. Mind you the Village is hardly "wheelchair friendly," there are four sets of step they have to go down and up in order to reach the Green Dome, unless they go the long way round!
Be seeing you