A British Bangladeshi (Bengali: ব্রিটিশ বাংলাদেশি) is a person of Bangladeshi origin who resides in the United Kingdom having emigrated to the UK and attained citizenship through naturalisation or whose parents did so; they are also known as British Bengalis. Large numbers of Bangladeshis emigrated to the UK, primarily from Sylhet, located in the north-east of the country, mainly during the 1970s. The largest concentration is in London, primarily in the east London boroughs, of which Tower Hamlets has the highest proportion, making up approximately 37% of the borough's total population. This large diaspora in London leads people in Bangladesh to refer to British Bangladeshis as "Londonis". Bangladeshis also have significant communities in Birmingham, Oldham, Luton and Bradford, with smaller clusters in Manchester, Newcastle upon Tyne, Rochdale, Cardiff, and Sunderland.

Bangladeshis form one of the UK's largest immigrant groups and are also one of its youngest and fastest growing communities. The population of Bangladeshis in Britain has grown steadily over the years. At the time of the 2001 UK Census, 154,362 Bangladeshi-born people were resident in the UK, and there were a total of 283,063 residents of Bangladeshi ethnicity. By 2007, the ethnic Bangladeshi population in England only was estimated to be 353,900. Estimates suggest there are about 500,000 Bangladeshis residing in the UK. Bangladeshis form a largely homogeneous community. Rates of unemployment are typically high, there is overcrowding, and some health problems. The latest generation of Bangladeshis, however, form a thriving community who are beginning to establish themselves in the mainstream of commerce and politics. Despite being the most recently settled of the major South Asian communities in Britain, the Bangladeshis are well established throughout the communities.

Cherie Blair QC (born 23 September 1954), known professionally as Cherie Booth QC, is a British barrister practising in England and Wales. She is married to the former Prime Minister of the United Kingdom, Tony Blair; the couple have three sons and one daughter.

Cherie Booth was born on 23 September 1954 at Fairfield Hospital, Bury, Lancashire (now Greater Manchester), England, and brought up in Ferndale Road, Waterloo, north of Liverpool. She was christened Theresa Cara Booth. Her father, British actor Tony Booth, left her mother, actress Gale Howard (née Joyce Smith), when Cherie was eight years old. She and her younger sister, Lyndsey, were then brought up by their mother Gale and their paternal grandmother, Vera Booth, a devout Roman Catholic of Irish descent. The sisters attended Catholic schools in Crosby and Sefton. Cherie Booth attended Seafield Convent Grammar which is now part of Sacred Heart Catholic College, where she achieved 4 Grade A GCE A Level passes. Cherie and Lyndsey have six half sisters, including British journalist Lauren Booth. Cherie Blair is a practising Roman Catholic.