He said he wanted around 20-50 taxis in operation by then as part of the Black Cabs Go Green programme, as well as 150 hydrogen-powered buses.

India has trained poor countries' civil servants for decades, in a programme called Indian Technical and Economic Co-operation (ITEC).

This has been dubbed "sterilised" QE or "Operation twist", after a 1960s programme in which the Treasury and the Fed tried to "twist" the yield curve by altering the pattern of Treasury-bond issuance.