Weight-loss jabs will be a “game-changer” for the economy, Wes Streeting has said.

A study, based on government modelling, suggests that the rollout of injections could save taxpayers £5 billion a year by dramatically boosting productivity.

The research found that prescribing jabs to about four million people could save an average of £1,100 per person annually – with an average of five fewer sick days for those taking the medication.

Treasury officials are already understood to be examining the case for wider rollout, with particular interest in the impact of the jabs on productivity and worklessness.

Tackling worklessness is a priority for the Government, which is attempting to reduce a spiralling benefits bill being driven in part by long-term sickness.