Moreover, Government funding was chopped and changed from year to year, so Tube managers could not invest effectively. By 1997 there was a massive investment backlog . With economic growth and increased tourism, overcrowding is now a daily problem. Too many trains are cancelled. 1 in 20 peak trains don't run, with severe knock-on effects for other services.
Broken escalators take too long to fix.
Some stations have been neglected since they were built. The Tube needs massive investment to bring it up to modern standards, and the PPP is designed to deliver that sooner than any other way of working. Government makes plans for LT grant three years ahead and revises its plans each year. Actual grant eventually paid was different again. All figures for total LT grant, including JLE, bus etc as well as 'core' London Underground.