Labour's deputy leader Angela Rayner is facing questions about whether she paid enough tax on a house sale, almost a decade ago.     She denies any wrongdoing and has been backed by the party's leader Sir Keir Starmer, with some colleagues claiming she's being "smeared".     On the Sky News Daily, Mark Austin unpicks exactly what Angela Rayner is accused of and discusses if the allegations are really in the public interest with Sky's political correspondent Rob Powell.     They also talk about how important Ms Rayner is to Labour's election ambitions with polling expert Scarlett Maguire.   Producers: Soila Apparicio, Emma Rae Woodhouse Promotions producer: David Chipakupaku Editor: Paul Stanworth