TUBE Lines has unveiled details of its £150 million station regeneration programme for the next 12 months.
The firm will refurbish 30 more stations on the Jubilee, Northern and Piccadilly Lines as part of its commitment to revamp 97 out of 100 stations by 2010.
Upgrade work has already been completed on 10 stations and a further 10 are due to be finished by next April.
Senior delivery manager Rob Porter said: 'We are now in our third year of operation and the station improvements programme is gaining momentum.'
Major refurbishment work is also planned on 11 lifts and 13 escalators across the network that are up to 39 years old.
Mr Porter said: 'This is a massive undertaking not seen on the Underground before. Every night we will have in the region of 1,500 people carrying out important improvement work to make the upgrade plans a reality compared with 100 people when we took over in January 2003.'
Fellow PPP operator Metronet has been hit by a string of delays in its capital works programme and has made a provision of £14 million for the potential late delivery of stations.