Andy Burnham has yet to win over the public as he approaches his 100th day in office , with voters split on his performance, a new poll suggests.

One in three of those who expected the Labour leader to do well as prime minister say they have been disappointed, the YouGov survey found.

Mr Burnham will mark his 100th day in Downing Street on Tuesday, just a day before a key test for his new government when chancellor John Healey unveils his first Budget.

Prime minister Andy Burnham will celebrate 100 days in office on Tuesday (Reuters)

Overall, the poll found that 23 per cent said that the new PM has so far met their positive expectations, although 12 per cent said they had expected him to do well and been dismayed.

Another 23 per cent said he has done as poorly as they anticipated, while 14 per cent who thought he would perform badly said he has done better than expected and most of the rest said they did not know.

Polling expert Lord Hayward said the findings suggested Mr Burnham was seen as “adequate…