The prime minister, Rishi Sunak, did not attend an Eid party at Downing Street due to parliamentary business.
Several Muslim figures boycotted the event in protest of the UK government's support of Israel during the ongoing conflict in Gaza.
About half of the usual attendees showed up, with some wearing Palestinian flags or keffiyeh scarves in solidarity.
Foreign secretary, David Cameron, had encouraged people to attend despite the boycott.
The annual reception for the Muslim community at 10 Downing Street, attended by the prime minister, had significantly fewer attendees this year.
Notable absences included Baroness Warsi, the first female Muslim cabinet minister, major Muslim charities, and significant business figures.
Those who attended reported that the gathering was smaller than usual, with around 50 people present.
Prime Minister Sunak did not attend, and there was surprise among attendees.
Downing Street issued a statement on Sunday, expressing Sunak's anticipation of welcoming members of the Muslim community in the future.
Deputy Foreign Secretary Andrew Mitchell welcomed guests instead of Prime Minister
Boris Johnson at a reception due to
Johnson's absence.
Some guests considered not attending due to the ongoing situation in Gaza.
One woman shared that she wanted to attend for the first-time experience but also wanted to express her concern for the situation in Gaza.
Other guests reportedly consulted with their families before deciding to attend.