Order of the Golden Fleece.
Starlink train inbound
https://satellitemap.space/
There does appear to be boards in that vid, https://www.youtube.com/watch?v=qjUwLHFsAMI . In a way, it would be odd for there not to be with that much passing pedestrian traffic on St Patrick's day. The only thing that is bugging me and this maybe a lighting issue, but I am not 100% that they match the ones in Q's pic. I did have a look at the signs a while back and there is a good match for them from SV in May, colours. Blue edge, bit of white, yellowy/orange edge etc.
Also, ref folding signs from >>13629723 [pb], these are present in the St Pats vid - I am guessing they are generic road closed/pedestrian only/direction type signs so not unusual for them to be used alot but it would make sense for them to be put out ahead of time ready to be setup.
I know May is way outside our shroud window, the SV comparison was just to illustrate the better colour match than appears in the St Pats vid.
Christmas events at the London Sky bar/Altitude 360.
London Sky Bar (Atmosphere Venues), 28th/29th Floor Millbank Tower,, 21-24 Millbank, SW1P 4QP
Christmas day 12pm - 12am
Boxing day 11am - 11pm
https://web.archive.org/web/20131101180648/http://www.altitudelondon.com/documents/altitude-christmas-2013.pdf