The route was first proposed in a review by Transport for London published in September 2016. A two-month consultation was held in 2017.[1] It had been expected to start service in May 2019, however it was delayed.[2] It began service on 25 January 2020.[3][4] A review found that passenger numbers were insufficient for the route to be sustainable. In autumn 2021, Transport for London opened a consultation requesting opinions on if the route should be extended, or withdrawn.[5][6][7]
In March 2022, Transport for London confirmed that the Sunday service would be withdrawn in the summer and that the route would be extended to Dagnam Park Square.[8]
In January 2024, following a public consultation, Transport for London confirmed that the route would be withdrawn on 9 March 2024. It was replaced by an extension of route 346 that now serves all the same roads and stops formerly served by route 497.[9]