11 indoor walls listed. Featured slots are labelled and empty until gyms actually pay — we do not fake a ranking.
Indoor
CCC
The Castle Climbing Centre
London · bouldering · ropes · cafe
BoulderingRopesCafeGarden
VW
VauxWall West
London · bouldering · cafe · bar
BoulderingCafeBar
VE
VauxWall East
London · bouldering · cafe · bar
BoulderingCafeBar
ACW
Arch Climbing Wall
London · bouldering · cafe
BoulderingCafe
MEC
Mile End Climbing Wall
London · bouldering · ropes
BoulderingRopes
WCC
Westway Climbing Centre
London · bouldering · ropes · kids
BoulderingRopesKids
SCC
Stronghold Climbing Centre
London · bouldering · training
BoulderingTraining
RCW
The Reach Climbing Wall
London · bouldering · ropes
BoulderingRopes
HS
High Sports
London · bouldering · ropes
BoulderingRopes
WSC
White Spider Climbing
London · bouldering · ropes
BoulderingRopes
CHL
The Climbing Hangar London
London · bouldering · cafe · training
BoulderingCafeTraining