Born on the island of Grenada in the Eastern Caribbean, Pascall was the eldest son in a family of 10. He travelled to Britain as a 22-year-old in 1959, having represented his country as a musician the previous year in the Bee Wee Ballet Dance Troupe at the inauguration of the Federation of the West Indies. He had originally intended to return home after five years but has remained in the UK for more than five decades. Early on he involved himself with music and his group The Alex Pascall Singers, founded in the 1960s, is reportedly the first known multi-cultural choir in London. A former member of the group, Jacques Compton, recalls about Pascall that "in addition to being a very excellent drummer and singer, he was also a composer of some excellent songs."
Pascall gained national prominence as a broadcaster through his work with the groundbreaking BBC Radio London programme Black Londoners, first aired on 22 November 1974, which he fronted for 14 years: "It began once a month, then once a week and within a couple of years we were broadcasting every day." Britain's first daily Black radio magazine programme, the hour-long Black Londoners – "half phone-in and half news content each day" – was an important vehicle for the discussion of issues affecting the black community, in particular the New Cross Fire in 1981, and provided a mouthpiece for many black musicians, artists and politicians who either lived in or passed through the capital. Pascall has paid tribute to the role of his late colleague Barry Clayton in the programme's genesis:
The responsibility for its development was placed in the hands of Barry Clayton as producer and me as presenter. We devised a magazine-style format programme for broadcast in November 1974.
Black Londoners was aired by BBC Radio London for 14 years, going on to become the first black daily radio programme broadcast in Britain from 1978 till 1988, when the station changed its name and the general format....
Barry and I also went off to the Caribbean to arrange a Christmas link-up of three of the islands (Jamaica, Barbados and Trinidad) for a special Channel 4 Christmas broadcast and developed links that later saw the return of Louise Bennett of Jamaica as one of the featured personalities for a Channel 4 series produced by Trevor Phillips."
In 1994, Pascall presented A Different Rhythm, an eight-part BBC Radio 3 series produced by Clayton and Nick Hughes, on the impact of the black presence on British music and musicians.
Other notable documentary features Pascall has researched and presented include Caribbean Cocktail on BBC Radio 2 (1994),They Came Before the Windrush on BBC Radio 4, produced by Marina Salandy-Brown, Alex Pascall's Caribbean Folk Music (1995), Let the Music Talk (24 June 1981) on Radio 2, produced by David Corser, Sophisticated Ladies (1997, Radio 4), a celebration of Black female stars of British musical theatre since the 1850s, Cricket Calypsos (25 July 1991 on Radio 3) and World War Calypso.
Pascall is also well known for his compositions for the Early Years landmark children's TV series Teletubbies and BBC Schools.
On Boxing Day 2015, Pascall launched an online radio show called Alex Pascall's Londoners on Good Vibes Radio.
From 1984 to 1989 Pascall was chairman of the Carnival and Arts Committee of the Notting Hill Carnival. Committed to internationalising Caribbean cultural developments in Britain, he also served as the founding vice-president and national representative of the Foundation for European Carnival Cities (FECC) – a federation of European carnivals.
In 1986, Pascall was appointed the National Coordinator for "Caribbean Focus 86", a festival of arts and culture, in association with the Commonwealth Institute in London and CARICOM governments. It was the first national festival to showcase Caribbean peoples' contributions in British lifestyle. Pascall worked on "Caribbean Express '86", a cultural exhibition train that travelled to 18 cities in Britain in 21 days, running educational workshops.
Pascall has frequently spoken out on issues particularly affecting the black community. He has been chair of the Black Members' Council of the National Union of Journalists (NUJ), a member of the Commonwealth Institute Education Advisory Committee, and a Trustee of The Tabernacle Arts and Community Centre in Notting Hill. Pascall is a Member of Honour of the NUJ.
As an inspirational speaker and educator, he makes frequent appearances at community projects and schools. On occasion he still performs as a singer.
Pascall is also a playwright, "oral historian and cultural strategist, teaching, performing and promoting Caribbean music and history to people of all ages in schools, universities, libraries and communities. He has written and documented material to respond to the need to make Caribbean folk arts widely accessible and holds a large historical archive spanning over five decades of Black presence in Britain." His play Common Threads, set within a plantation on the island of Grenada and Big Pit Colliery in South Wales, revolves around the history of the sugar and coal industries and was first presented in 2001 by Gwent Theatre. Pascall was also involved in pioneering the "Roots to Torfaen" local history project, "to encourage pupils, parents and community members to explore their roots, celebrate cultural diversity in their area and discover global links."
Alex Pascall was made an Officer of the Order of the British Empire (OBE) in 1996 for services to community relations. At a civic reception given by Islington Council on the day Pascall received his OBE, Sir Shridath (Sonny) Ramphal paid tribute to him as a "cultural 'guru' for Caribbean people in Britain who has spent 35 years as a commentator par excellence, teaching, performing and promoting Caribbean music and history".