Improvements are coming for the London Underground Sub-Surface Lines

The sub-surface Circle, District, Hammersmith & City and Metropolitan lines are set to have a new signalling system in order to improve reliability and services.

From TfL press release

Reliability and customer information on sections of Circle and Hammersmith & City lines to improve from next year.

· New system will mean quicker, more frequent services on sub-surface lines from 2021

· 40% of Tube to benefit from huge improvements by 2023

· The transformation of London Underground's sub-surface lines has taken a significant step forward, with multiple test trains running on the brand new signalling system for the first time in London.

Upgrades for Piccadilly and Metropolitan Lines

Recently, London Underground announced that engineering works are to take place on the Piccadilly Line on the 5th and 6th March and the Metropolitan Line on the 16th May 2016.

From TFL Press Release

TfL today advised customers planning to use the Piccadilly line this weekend to expect longer journeys, due to planned upgrade work.

To improve the reliability of the Piccadilly and District lines London Underground (LU) is carrying out essential planned work this weekend to replace 700m of track at Turnham Green and renew a set of signalling points at Acton Town.

Video: London Underground S Stock train in action

On 3rd November 2014, I have captured footage of the London Underground S Stock train at Barbican station. Then I boarded the S stock train Eastbound towards Liverpool Street.