It is expected to uncover a 35 per cent jump in the number of morning overruns on the Underground. Transport for London is due to publish the report on the progress of Metronet and Tube Lines shortly.
Today Metronet chairman Keith Clarke said: 'Because of the PPP, the Tube has, for the first time in its history, a secure financing stream to enable both medium and long-term planning and investment.
'For its part, Metronet has already secured investment of £7 billion in the first 7.5 years alone. This report accepts that much has been done - we all agree there is much still to do.'
Tube Lines said it performed well on track renewals and improvements and it completed seven out of nine station upgrades on time.
In a statement Tube Lines said: 'The report shows that the working relationship between LU and Tube Lines has been improving in a number of areas, and we endorse that. We are also pleased that our excellent record on safety was recognised.'