NHS contractor BT Capital Care Alliance and software supplier IDX have successfully rolled out a new patient administration system at Queen Mary's Sidcup NHS Trust.
The system is the first that Connecting for Health, the NHS agency which manages the £6.2bn national programme for IT, has delivered in London after more than a year of delays.
The deployment will give BT some breathing space. In October, Connecting for Health chief executive Richard Granger told Bloomberg news service that BT's performance at Queen Mary's would be an indication of whether the supplier had its NHS contract under control.
The IDX system has already proved difficult to implement in some NHS hospitals. Earlier this year, Fujitsu, the local service provider for the southern region of the NHS national IT programme, cancelled its contract with IDX after it failed to successfully roll out the technology in any hospitals.
Granger had already reduced payment to BT for delays on a separate NHS contract to build a broadband network. In July he warned that "predictable events would occur" if it did not get some substantial functionality from IDX before the end of the summer.
This was widely interpreted as a threat to cancel BT's contract for London.