Bulletin PM briefing: Four stabbed in tourist hotspot and radon gas prisons

Here are five of the day’s biggest stories, in case you have missed them

• Four stabbed in broad daylight in London’s Covent Garden – all we know.
• The nine prisons battling to contain dangerous radon gas levels.
• Family's tribute to girl who died after being found on industrial estate.
• Jewish leaders refuse to meet with former neo-Nazi Tory candidate.
• Russian ballistic missile strike on Kyiv kills 17 with dozens injured.