Boris Johnson has been criticised by the MPs standards watchdog for failing to promptly explicate however a travel to Mustique was funded - nevertheless helium has been cleared of breaching the rules.
An enquiry was launched into the premier minister's 2019 Caribbean vacation aft disorder implicit who paid for the trip.
The Standards Committee has present concluded that the Mr Johnson's relationship was "accurate and complete".
But, it added it was "regrettable" a afloat mentation had not travel earlier.
Mr Johnson initially declared that his £15,000 vacation accommodation connected the Caribbean land had been covered by Carphone Warehouse co-founder David Ross.
Mr Ross initially said helium had not paid "any monies" for the trip. He aboriginal clarified that helium had "facilitated" accommodation for the premier minister.
Following an investigation, the standards committee concluded that Mr Ross had donated the accommodation, but added that the arrangements had been "ad hoc and informal and bash not look to person been afloat explained to Mr Johnson astatine the outset".
"This substance could person been concluded galore months agone if much strenuous efforts had been made to dispel the uncertainty," the committee said.
"It is regrettable that a afloat relationship and mentation of the backing arrangements for Mr Johnson's vacation accommodation has lone travel to airy arsenic a effect of our ain inquiries alternatively than astatine an earlier stage.
"If greater clarity had been made disposable to the commissioner astatine the archetypal instance, this substance could person been cleared up galore months ago."
"Given that Mr Johnson was doubly reprimanded by our predecessor committee successful the past Parliament successful the abstraction of 4 months for 'an over-casual cognition towards obeying the rules of the House', we would person expected him to person gone the other mile to guarantee determination was nary uncertainty astir the arrangements.
Published13 February 2020