The government has announced its third successive hand-out to the NHS in as many days with a pledge by Boris Johnson of £250m to be invested in artificial intelligence. The prime minister claimed AI would transform care and cut waiting times as he announced the money for a national artificial intelligence lab, to work on digital advances to improve the detection of diseases by predicting who is most likely to get them. However, health experts warned that the NHS had a poor record with technology and any new systems would need "robust evaluation" to ensure they did more good than harm as well as proper implementation with safety standards and training. They also raised concerns over where the money was coming from and whether it was the result of trade-offs elsewhere in the cash-strapped health service. AI is already being used in some hospitals to predict cancer survival and cut the number of missed appointments.