The cheapest mortgage rate on the market is now at its lowest point since Liz Truss’s mini-Budget back in September 2022. NatWest is offering a five-year deal to new customers who come to it direct at a rate of 3.71 per cent – though only if they have a deposit worth 40 per cent of their property value. The deal also comes with a hefty fee of £1,495. According to financial analytics company Moneyfacts, at the start of September 2022, the month t…