Body with power to suspend MPs could investigate Boris Johnson flat refurb

Exclusive: Labour asks parliamentary commissioner for standards to investigate any potential breach of MPs' code of conduct

Boris Johnson's refurbishment of his Downing Street residence could be investigated by parliament's sleaze watchdog, a move that would mean the prime minister could be personally sanctioned if found to have breached conduct rules.

The Guardian understands an extensive complaint has been submitted to the parliamentary commissioner for standards, Kathryn Stone, with powers that can lead to suspensions of MPs or even byelections if serious breaches have occurred.