Gaie Delap was sentenced to 20 months in prison in August for being part of a group that blocked the M25 over new government oil and gas licences in November 2022.
Former Green Party leader Caroline Lucas and TV presenter Chris Packham have both resigned from their leadership roles at the animal rights charity RSPCA.
The payment has been reformed, potentially saving the Treasury around £1.4bn this financial year, according to Chancellor Rachel Reeves. But some pensioners could lose the benefit if they do not take action.