Sky News' Beth Rigby has asked the prime minster how he can build trust with pensioners who voted for Labour after he cut their winter fuel allowance.
This, Beth points out, wasn't in the Labour manifesto, so how can the PM promise not to raise other taxes?
Sir Keir reiterates again that "in relation to working people, income tax, VAT and national insurance, we will not increase tax".
He says the "number one mission" of the government is to grow the economy, and says fixing the transport system and the NHS will both help this.
He also says that the new National Wealth Fund, Great British Energy and "unlocking planning" will allow the country to focus on improving the
economy.