The 68-year-old was arrested on suspicion of murder, assisting offenders, withholding information and preventing a lawful and decent burial.
Sir Keir Starmer hosted Volodymyr Zelensky along with French President Emmanuel Macron and German Chancellor Friedrich Merz for private talks.
Dame Jilly was an executive producer and the visit to the studio in Bristol had been organised before her death in October.
Lake Jackson Ltd, based in Lingwood, Norfolk, has been shut down by the SRA following concerns about dishonesty by its owner and regulatory breaches.