On vaccine equality, the UK has failed to show the leadership the world needs | Mohamed Adow and Tasneem Essop

Britain has broken the promises Boris Johnson made before the G7 - a change of tack is necessary to make Cop26 a success

Covid and the climate crisis are the two defining global crises of our time and Britain has a crucial role to play in addressing them both. As the Cop26 host, it will be responsible for overseeing a successful outcome at the UN climate talks in Glasgow in November.

Only a few weeks ago, before the prime minister hosted the G7, Boris Johnson promised the group of wealthy nations would vaccinate the world by the end of the year.