Two catchments, twins on the map. One incumbent set is 15 points worse.
Two adjacent inner-London districts read as twins on every map a dark-store planner already owns — near-identical grocery demand, the same dense incumbent footprint, the same young skew. A footfall read says "either works — sign the busier one." The consumer-opinion layer flips the call: in one, shoppers rate the incumbents well (CSAT 65.7) — a served, satisfied market a new dark store has to fight. Next door, the same shoppers rate the incumbents lowest of five adjacent inner-London boroughs (CSAT 50.2), a ~15-point gap that has held for four straight years. Same people, same demand — but only one catchment has left the door open.