Crown offices are Post Office branches directly managed by the company - as opposed to locally-run by sub-post offices - mainly based in major High Streets.
BBC: Post Office staff go on strike at Crown offices
2.
With more than 600 main post offices and 18, 000 sub-post offices handling 20 billion letters a year, the service has not only deep roots but strong allies.
ECONOMIST: Post Office
3.
He has argued that greater thought should be given to how postal services are delivered to country parishes, and believes a network of sub-post offices should be maintained.
BBC: Plans outlined for Jersey Post to have more competition