Indicator detail
Concentration Index
Measures how concentrated listing activity is among repeat advertisers within a monthly snapshot.
Latest month
2026-08
Latest series value
28%
Coverage
10,338
Method
The published outputs include top-share measures and a Herfindahl-Hirschman style concentration score.
Interpretation caution
Concentration may reflect agencies, reposting strategies, or market structure, not ownership certainty.
Largest latest regions
Regional context
East London
Incall £100 | Intimacy 60%
971
North West London
Incall £110 | Intimacy 57%
430
Birmingham
Incall £120 | Intimacy 63%
378
West London
Incall £100 | Intimacy 63%
359
South West London
Incall £120 | Intimacy 60%
344
North London
Incall £100 | Intimacy 70%
325
Manchester
Incall £130 | Intimacy 57%
263
Central London
Incall £150 | Intimacy 51%
243