The Adjudicators initially considered appeals against decisions made by Immigration Officers, entry clearance officers and the Home Secretary, based in permanent centres in Islington, London, Hatton Cross, Birmingham, Leeds, Manchester and Glasgow.
The Tribunal dealt with applications for leave to appeal and appeals against decisions made by the Immigration Adjudicators, with its main hearing centre in Bream's Buildings, off Chancery Lane in Central London.
The Tribunal was headed by a President, who was required to be a barrister or a solicitor of at least seven years' standing.
Act 2004, which created the single tier Asylum and Immigration Tribunal to replace it.
The former 'regional adjudicators' became known as Senior Immigration Judges, mostly involved in reconsidering applications for challenging the outcome of appeals.