Apostille vs. Embassy legalisation for Cameroon
Cameroon has not joined the Hague Apostille Convention, so one British certificate does not close a file meant for use there. Papers heading that way need embassy or consular legalisation instead, which is a run of separate acts by separate bodies. No apostille issued in Glasgow for use in Cameroon is read as finished work at the far end, however clean it looks.
Cameroon's Hague status & what it means
Being outside that treaty changes the shape of the job rather than the paper itself. Inside it, one fixed certificate is agreed in advance and read the same way everywhere. Outside it, each body wants to see the mark of the body before it, so the work becomes a chain and the order of the links is not yours to choose.
The Glasgow → Cameroon route step by step
Two government offices matter at the British end, and they do different jobs. Glasgow Registration Office at 45 John Street, Glasgow G1 1JE prints certified extracts of Scottish births, marriages and deaths. The FCDO Legalisation Office at PO Box 6255, Milton Keynes MK10 1XX works by post and has no counter for callers, so nobody hands anything over in person.
What each one vouches for is narrow. The register office says this extract matches the entry it holds. The British mark says the signature and seal on that extract are genuine. Document legalisation for Cameroon then adds a consular act on top, and that act speaks for the British mark rather than for the record underneath it.
Cost & timing for this route
The British charge is £45 / document by standard post, or £40 / document next-day where the sender is a registered business, and a further official charge applies at the consular stage. An apostille from United Kingdom to Cameroon is therefore never the whole bill, and it is never the whole clock either, since the second stage keeps hours the first knows nothing about.
Destination-specific requirements
Since no single mark settles a Cameroon-bound file, the useful question is what stays open once the stamps are on. Your entitlement stays open. The reading of your case stays open. The day somebody abroad acts on it stays open. Only the identity of the paper is closed, and closing that is all the chain was ever built to do.