Virtually every station on the Tube network will either be refurbished or modernised
Improvement works at Northolt and Woodford stations have just got underway.
Refurbishment works will be carried out by Metronet Rail BCV, the company responsible for the renewal and maintenance of the Bakerloo, Central and Victoria lines.
Jeff Ellis, General Manager of the Central line said: 'This year the pace of work on the Tube will increase to almost double that of last year, a pace that will be maintained for many years to come as we work to Transform the Tube thanks to TfL's £10bn five year Investment Programme.
'Over the next five years, virtually every station on the Tube network will either be refurbished or modernised and a key element is the upgrading of CCTV facilities from analogue to digital and the recording of high quality images to hard drive rather than traditional magnetic tape.
'London Underground (LU) operates over 6,000 CCTV cameras and is one of the biggest users of CCTV in the world.
'As part of the station modernisation programme, the number of CCTV cameras will double to 12,000 by 2011.
'This is all about making the Tube even safer for passengers to use no matter the time of day.'
Northolt station will remain open while the works take place, except on the following weekends: 27/29 May, 17/18 June, 8/9 July, 15/16 July and 23/24 when planned track closures will allow Metronet to take advantage of these engineering works to speed up the work.
Woodford station will also remain open except for the waiting rooms and public toilets, which will be closed from May.
Refurbishment works in both stations will include the restoration of most heritage features, the replacement of existing CCTV cameras, the installation of help points, an enhanced PA system and tactile strips and contrasting handrails for the visually impaired.
All cabling will be concealed and ceilings will be either replaced or decorated.