In message , Paul Scott
writes

You don't need to be going to Aberdeen. Anywhere ungated on any NR
route outside London would do; and there are many such places in
Surrey, Sussex, Kent etc etc...

You don't even have to go outside London. Kensington Olympia, Chiswick
Wandsworth Town, Barnes and Mortlake are ungated, as are Blackheath and
Deptford, and dozens more. Not to mention almost all of the DLR ...
--
Paul Terry