The United Kingdom’s Deputy Prime Minister Angela Rayner has stepped down after a probe found she violated the ministerial code for underpaying tax on her flat, prompting a broader cabinet reshuffle and throwing the Labour Party deeper into turmoil. In a letter to Prime Minister Keir Starmer on Friday, Rayner conceded she “did not meet the highest standards” and would resign from her roles as housing minister and deputy leader of Labour. “I deeply regret my decision to not seek additional specialist tax advice,” said Rayner, having last week admitted to underpaying a surcharge on the flat. She said she took “full responsibility for this error”. Starmer replied that he was “very sad” to lose her from government, but added:...