PM also criticises business figures and opponents of changes, many of which come into force on Monday

• Workers, pensioners and children: all better off. Ignore the critics – we really are standing up for working people

Keir Starmer has used a series of new workers rights that come into force on Monday to attack the Green party, saying a vote for Labour’s rivals puts such progress on sick pay, parental leave and zero-hours contracts at risk.

The prime minister also took a swipe at business figures and opponents of what he described as the biggest strengthening of workers’ rights in a generation, dismissing “vested interests” who had warned against them.