A transport passenger group has hit out at annual private tube profits which are expected to total £50m.
Tube passengers are to experience fare rises
Annual pre-tax profits for Metronet, which maintains two thirds of London Underground (LU) lines, are in the region of almost £1m a week.
The Capital Transport Campaign group said it was a "bitter pill to swallow" as ticket prices are set to rise.
Last month the Mayor of London announced that Tube fares would go up to help pay for a £3bn investment.
Cynthia Hay, co-ordinator of pressure group Capital Transport Campaign, said: "No one seems to want to take responsibility for the underground and passengers have come to expect little change in the service.
"Our campaign group was set up 21 years ago and despite our efforts there has been little improvement.
"Passengers are just not experiencing a good service."
Metronet is expected to announce its financial figures together with its half-yearly performance figures on Friday.
On Tuesday Tube Lines - the other private maintenance firm - announced it had its best quarter-year performance since it took over the lines.
But it added signal failures rose by almost 50% from 22 August to 18 September, compared with the same period in 2003.