In public services and security you could work at a desk in an office or in an active outdoor job.
Civil service (central government) and local authorities run the services we rely on such as education, roads and benefits. The armed forces include the British Army, Royal Navy (and Royal Marines) and RAF. Emergency services are there when we need the police, ambulances, fire and rescue, coastguards and lifeboats. The prison service looks after people serving sentences in prison. The security industry keeps buildings and people safe.