Number 10 said a “mistake” had been made in the organisation of the event and sought to assure the community “it will not happen again”.

Hinduism does not have a clear prohibition on alcohol or meat consumption, but many Hindus choose not to drink and some are also vegetarian.

The Downing Street celebration prompted complaints from UK Hindus including Shivani Raja, the Conservative MP for Leicester East, who said she was “greatly concerned” to hear about the event.

A Number 10 spokesperson said: “The Prime Minister was pleased to welcome a range of communities celebrating Diwali to a reception in Downing Street.

“He paid tribute to the huge contribution the British Hindu, Sikh & Jain communities make to our country and how the government is driven by the shared values of hard work, ambition and aspiration.

“A mistake was made in the organisation of the event. We understand the strength of feeling on this issue and so would apologise to the community and assure them it will not happen again.”

The Downing Street Diwali event has taken place since 2009. It gained prominence during the premiership of Britain’s first Hindu prime minister Rishi Sunak, who was pictured lighting traditional candles with his family on the occasion.

In a letter to Prime Minister Sir Keir Starmer, Ms Raja had said she was “greatly concerned” to hear that attendees of this year’s celebration were offered meat and alcohol.

“I feel this speaks poorly against the organisation of this year’s event – with a disappointing lack of knowledge of the customs and traditions that many British citizens hold dear,” she said.

“As a practising Hindu, representing thousands of Hindus within my own constituency of Leicester East, I have been deeply saddened to hear that this year’s festivities were overshadowed in the greatest Office of State by negativity, as a result of this oversight.”