Transport for London has defended its policy of not fining the vast majority of passengers caught without a face covering.
Bosses insisted that offenders who are let off with a warning are likely to follow the rules on their next journey.
It has been compulsory to wear a face covering on public transport in England since June 15, to tackle the spread of coronavirus.
TfL and British Transport Police carried out a joint enforcement operation at King’s Cross St Pancras Tube station on Thursday.
Passengers stopped for not wearing a face covering did not face further action if they had one with them and put it on. This included those who had already completed their London Underground journey.
One man who was not carrying a covering was issued with a fixed penalty notice of £200
Fines double each time someone is caught, up to a maximum of £6,400
TfL initially focused on encouraging compliance, but switched to an “enforcement phase” on July 4
Since then, officers have carried out 105,000 interventions, with 7,600 people stopped from boarding a train or bus, and 1,800 passengers removed from a service.
TfL’s director of compliance, policing operations and security Siwan Hayward saidaround 400 fines have been issued by TfL to passengers who “absolutely refuse to comply with the requirement”.
We very much want people to do the right thing and Londoners want to do the right thing. “We’ll only fine people very much as a last resort. “If someone has a face covering with them then what we find is being reminded, being engaged with by our officers, means they will then next time wear a face covering the whole time for the entirety of their journey.
She added that around 90% of passengers are complying with the rules at peak times.
We are pleased to report that compliance with this law has been high across the Tube and rail network. However, a small percentage of people are failing to comply with the requirement. We therefore continue to deploy officers across the network to ensure compliance rates remain high on board trains and in stations.
Earlier this week Boris Johnson’s father admitted he “slipped up” after being photographed again breaching rules on wearing masks.
After the photograph was published, showing him at a Bakerloo line Tube station with his mask under his nose, Stanley Johnson insisted he was unaware the rules also applied when standing on a platform.