To explain my tag it’s the headquarters of The Woodcraft Folkhttps://woodcraft.org.uk/ a throughly lovely youth organisation .
In the 1920s despite Scouting for Boys being rewritten some felt Boy Scouting was too militaristic and split off to form The Kindred of the Kibbo Kift.
This group then had a further schism and The Woodcraft Folk was started.who are still going with 25,000 members apparently.
The Woodcraft Folk are supported by The Co-operative Society hence the Brixton Cycles hint.
The Kibbo Kift developed into a political organisation expousing a universal minimum wage https://en.m.wikipedia.org/wiki/Kibbo_Kift
They had a paramilitary wing The Greenshirts who tangled with the BUF blackshirts. When marching in uniform was banned they marched carrying their shirts on a coat hanger .