Labour peer Lord Alli is being investigated by the House of Lords' standards watchdog for allegedly failing to register interests.

A complaint was lodged last week referencing Lord Alli's donations, including clothing to senior politicians like Sir Keir Starmer.

The prime minister has assured compliance with rules, stating that Labour will reject similar future donations.

As a member of the Lords, Alli must register interests per the parliamentary code of conduct.

A Labour spokesperson says Alli will fully cooperate and believes all interests are registered.

The investigation, understood to edit clerical elements of declared interests, has not publicly detailed the complaint specifics.

However, it concerns potential breaches of transparency rules demanding clear interest declarations.

The rules mandate peers to register interests within a month of changes.

The Lords Commissioners for Standards, also examining other peers over separate matters, are conducting the investigation.

The donations controversy persists since Labour's July election win.

Amid this, Downing Street revealed the prime minister repaid over six thousand pounds for gifts since the election.

The row emerged in August when Lord Alli received a Downing Street security pass without a formal role, an incident Labour denies involved wrongdoing.

Sir Keir has registered accommodation donations worth over twenty thousand pounds to support his son during exams and received clothing and spectacle donations worth thirty-two thousand pounds from Alli.

Donations were re-categorized after advice.

Sir Keir is among seven ministers who received Lord Alli's donations.

Recently, the government decided to tighten ministerial hospitality rules to enhance transparency.

Cabinet Office minister Pat McFadden confirmed ministers must also declare job-linked hospitality in the MPs' register.

Other MPs have also listed free gifts at events in their interest registers.