YouTube video clips
Drivers View wrote:
It denotes the start of a temp speed restriction (15mph) EB across points,
just after the EB platform at South Kensington. This clip was filmed via
Westbound/Outer rail. An EB District/Circle train would see an illuminated
white square with "15".
Next week I'll upload clips Inner rail circle daylight, and a run to/from
Thanks. You learn something new every day!