Mayor Sadiq Khan also joined the group from all faiths to mark the last few days of the fasting month.
"We made history in 2019 when London's Trafalgar Square hosted the first-ever iftar," said Khan, speaking to Anadolu Agency.
"We didn't think the second one would be three years later. it's been three years now because we've missed out in 2020 and 2021," he said, referring to a break due to the coronavirus pandemic.
"It's wonderful to be back here with Muslims or non-Muslims, men, women and children. Many of us open our fast in one of those famous squares in the world, and it's wonderful."
Khan also invited everyone to come to London next Saturday for a celebration of Islamic culture.
"We celebrate our diversity here in London. You're free to belong to any religion here in London. Muslims or non-Muslims get on really well. Here in London, we think it's really important not simply to tolerate differences, but to respect them, to embrace them, and to celebrate them."
