What percentage increase has there been in the number of people wearing the face masks on TfL services since becoming mandatory in response to the Omicron virus?

Following the re-introduction of the mandatory face covering requirement on public transport on 30 November 2021, feedback from Transport for London (TfL) frontline staff as of 7 December 2021 suggested around 80 per cent compliance. TfL’s independent customer research reports every four weeks. The results for the period since the re-introduction of the mandatory requirement are not yet available.