Further to your answer to question 2021/4263, please provide an update on the evaluation that has been undertaken of the reduction of residential noise levels following the trial replacement of Pandrol Vanguard (PV) track fastenings with alternative Delkor track fastenings between Baker Street and St John’s Wood on the Jubilee line.

Transport for London (TfL) believes that the Delkor track fastening offers a similar benefit in terms of limiting residential noise levels, while significantly reducing in-carriage noise, in comparison to Pandrol Vanguard (PV). This is based on the results from a trial on the Jubilee line, where TfL has replaced PV with Delkor on a section of track between St John’s Wood and Baker Street.

TfL anticipate similar results across the Tube network, and the next site for installing Delkor is Camden Town to Euston on the Northern line. These works have now started. I understand that TfL officers will be writing to Assembly Members shortly, to offer the opportunity to visit these works if this would be of interest.