Postal activities under universal service obligation

SIC code 53100 is the UK Standard Industrial Classification code for "Postal activities under universal service obligation". It sits in Section H (Transportation and Storage) within division 53. UK companies registering this code on Companies House describe their main business activity as falling within this category. Companies pick one or more SIC codes when they incorporate, and 53100 is chosen by businesses whose principal activity matches its definition.

Any UK company can register SIC code 53100 when it incorporates or updates its confirmation statement. In Scotland, the most recently incorporated examples are listed above. Across the UK, businesses selecting this code describe themselves as working in postal activities under universal service obligation. The SIC code is self-selected at registration, so the choice reflects how each company classifies its own activity rather than an external assessment.

Every UK company's SIC code is visible on its overview page at the Companies House free public register. Companies self-select their SIC code or codes when they incorporate, and they update them annually via the confirmation statement filing. To look up the meaning of any SIC code, browse the full UK SIC 2007 list at the SIC code lookup tool.