LONDON — Britain’s politicians can’t seem to stop swearing. The British public don’t like it. The air around the famous green benches of the House of Commons is turning increasingly blue these days as MPs — and their House of Lords counterparts — indulge in record levels of cursing in speeches and debates. Others have been left squirming after their muttered profanities from the backbenches were caught on a hot-mic. Britain’s straight-laced opposition leader Keir Starmer — the favorite to become prime minister later this year — added his own expletive to the record last week when he used his appearance at prime minister’s questions to repeat an anonymous briefing to a newspaper which had described the government’s childcare policy as a “shitshow.” Labour strategists insist they don’t plan to make a habit of Starmer’s swearing in parliament, noting the phrase was pulled from the front page of the Times. But Starmer’s profanity was very much on trend. Data from Hansard, the official parliamentary record, show politicians’ usage of words such as “shit” and “fuck” have …