The companies annual return also requires it to disclose it's SIC code. This will also inform a viewer of it's potential trading status as 'non-trading' has it's own code.
Also, the poster that postulated that a company needs to file accounts within 9 months and 1 day of it's accounting reference date is technically incorrect. It is now a calendar 9 months. But if a company reaches 9 months and has not filed it's accounts at CH, it can apply to shorten/extend (extend only once every five years) it's ARD, even by one day. In the case of shortening this will then give the company a further three months to file the accounts. In the case of extending you get 9 months from the extended date. It is something that we have to do occasionally for 'those' clients who are habitually tardy.