In Photos: Representatives from Commonwealth nations arrive for Queen's Dinner

With UK leaving European Union Commonwealth - a collection of former states that were once part of the British Empire - is likely to become increasingly important in terms of trade opportunities for Britain. (Photos: AP)

Commonwealth Secretary-General Patricia Scotland, front left, arrives at Buckingham Palace.

New Zealand's Prime Minister Jacinda Ardern and her partner Clarke Gayford arrive in the East Gallery at Buckingham Palace.

Jamaica's Prime Minister Andrew Holness, centre, and his wife Juliet.

Nigeria's President Muhammadu Buhari, centre, and his wife Aisha arrive at Buckingham Palace.

Australia's Prime Minister Malcolm Turnbull, centre, and his wife Lucy arrive at Buckingham Palace in London.

Bangladesh Prime Minister Sheikh Hasina arrives to attend The Queen's Dinner.

Sri Lanka's President Maithripala Sirisena, right, arrives at Buckingham Palace in London as Britain's Queen Elizabeth II hosts a dinner during the Commonwealth Heads of Government Meeting (CHOGM).

Britain's Prince William speaks to guests during a reception at the Queen's Dinner.

Sri Lanka's President Maithripala Sirisena, right, arrives at Buckingham Palace in London as Britain's Queen Elizabeth II hosts a dinner during the Commonwealth Heads of Government Meeting (CHOGM).

Seychelles President Danny Faure, right, arrives in the East Gallery at Buckingham Palace.

Gambia's President Adama Barrow, left, arrives.

Britain's Prince Harry talks with guests during a reception after a receiving line for the Queen's Dinner for the Commonwealth Heads of Government Meeting (CHOGM) at Buckingham Palace in London.

Pakistan's Prime Minister Shahid Abbasi and guest arrive for the Queen's Dinner, during the Commonwealth Heads of Government Meeting at Buckingham Palace in London.

Britain's Queen Elizabeth II delivers a speech during a dinner she hosted at Buckingham Palace in the week of the Commonwealth Heads of Government Meeting, (CHOGM).

Canada's Prime Minister Justin Trudeau attends the Queen's Dinner.

Britain's Queen Elizabeth II, greets India's Prime Minister Narendra Modi in the Blue Drawing Room at Buckingham Palace as the Queen hosts a dinner during the Commonwealth Heads of Government Meeting, in London.

Britain's Queen Elizabeth II, greets Timothy Harris, Prime Minister of St Kitts and Nevis in the Blue Drawing Room at Buckingham Palace as the Queen hosts a dinner during the Commonwealth Heads of Government Meeting, in London.

Britain's Queen Elizabeth II greets Lee Hsien Loong, Prime Minister of Singapore, and his wife Ho Ching in the Blue Drawing Room.