An investigation has found Labour shadow minister David Lammy breached the MPs’ code of conduct by inadvertently failing to register a total of 16 interests on time.

These included payments for Black History Month speaking engagements and appearances on a commercial radio station, as well as tickets to American football and boxing matches in London.

Under the rules, MPs must register changes to their financial interests within 28 days.

In her summary, Parliamentary Standards Commissioner Kathryn Stone said she initially opened an inquiry on June 16 after receiving an allegation that Mr Lammy was involved in eight events between October 7 and November 15 2021 which he failed to register within the set timeframe.

Ms Stone then undertook a review of Mr Lammy’s register entry and found a further seven interests that had been registered late.

The shadow foreign secretary went on to bring to Ms Stone’s attention another “single late declaration”, which was added to the scope of the investigation.

The commissioner said, based on the evidence, she was satisfied “there was no deliberate intention to mislead”, but concluded that Mr Lammy did breach the code by registering a total of 16 interests outside of the 28-day deadline.

This was “as a result of inattention to detail”, she said, and found the breaches were “inadvertent”.

She concluded that a referral to the Standards Committee was “not necessary”.