Between March and September 2020, 72 ‘Low Traffic Neighbourhoods’ (LTNs) were implemented in London. We examined the impact on fire brigade emergency response times October 2020-February 2021 (‘post’), as compared to same months previous two years (‘pre’). found no evidence that inside LTNs or boundary roads affected (e.g. pre/post change for first engine: -14 seconds LTNs; -11 rest of London; ...