Complex sentence: West Mercia Special Constabulary does not use the SC logo as all Officers under Inspector (regular and special) have the West Mercia Police Crest on their epaulettes, all collar numbers have four digits, beginning with either a 4 or a 5.
Split into simpler sentences: West Mercia Special Constabulary does not use the SC logo as all officers under the rank of Inspector (regular and special) have the West Mercia Police crest on their epaulettes. All collar numbers have four digits, beginning with either a 4 or a 5.