Russia is prepared to launch a series of cyber attacks on Britain and other Nato members as it seeks to weaken support for Ukraine, a senior Cabinet minister will warn in a major speech next week.

Sir Keir Starmer has promised sweeping changes to crack down on what he described as the “bulging benefits bill blighting our society”.

Mohamed Adow, of the think tank Power Shift Africa, said the summit ‘has been a disaster for the developing world’.