Britain's parliamentary standards watchdog is investigating Reform UK deputy leader Richard Tice over a possible failure to declare an interest, the commissioner said on Monday. The investigation was opened on 28 July and will be conducted by the parliamentary commissioner for standards, Daniel Greenberg. The watchdog gave no details of the allegation beyond that. Tice said the complaint related to a debate on Israeli influence and whether he should have referenced his register of interests. The news comes as Reform UK continues to face scrutiny over its internal procedures and the conduct of its senior figures. No further information about the complaint has been released, and it is not yet clear when the investigation will conclude. The parliamentary standards process typically examines whether members have breached the rules on declaring financial or other interests during debates and other official business. Tice has not commented further on the matter. The investigation is the latest involving a senior political figure, though the watchdog does not usually publish findings until an inquiry is complete.