Somebody who serves the community visits and tells the scouts about their work.
e.g. Nurse, policeman, soldier, fireman, paramedic, health visitor, religious leader, counsellor, guide dog trainer, animal charity worker, charity worker, teacher, child minder etc etc
Uniform / tools of the trade
Visitor describes how they serve their community to the scouts. If they have a uniform or tools of the trade they will show / demonstrate them. Next the scouts ask the visitor questions about their work.