Agency workers

Airmen

Armed forces

Artistes and entertainers

Crown servants

Diplomatic staff

Directors

Divers and rig workers

Examiners

Generally

Homeworkers/outworkers

Lecturers, teachers, instructors

Lloyd's Names

Mariners

Married couples and civil partners

Ministers of religion

Partnerships

Personal service companies

Share fishermen

Sportspeople

Sub-postmasters

Trainees

Volunteer development workers