Apostille vs. Embassy legalisation for South Sudan
One system hands a country a single standard certificate and asks it to accept that without more. The other keeps a foreign government's own officials in the loop, reading the file in Britain before it counts abroad. An apostille for South Sudan belongs to a system South Sudan is outside, so the second describes this corridor. Which system applies is decided at country level and cannot be selected by an applicant.
South Sudan's Hague status & what it means
South Sudan has not joined the Hague Apostille Convention. There is no application, appeal or hardship case that changes that for one document, because the position is not about your document at all. It sits between two states, it applies to every paper travelling this way, and the offices you deal with have no discretion to set it aside for a good reason.
There is no exception to apply for
People reasonably look for a lever, and this route has almost none. There is no expedited category that converts consular legalisation into a certificate, no fee that removes a stage, and no office in Britain empowered to bless a document for a country that does not use the arrangement. Hunting for the lever is the most common way to lose a fortnight here.
What remains is ordinary preparation, done early. Plymouth Register Office at Derriford Park issues certified copies of birth, marriage and death records, so a civil record can be replaced with a travelling version while the original stays at home. Getting that copy in hand, with the right details on it, is worth more than any argument about the route, because it is the only part of the timetable you own.
Cost & timing for this route
The British charge is £45 for each document by post at the Legalisation Office, or £40 for each on the next-day route open to registered businesses. The consular charge belongs to the receiving side and is not published on this page, and neither is its turnaround. Because two independent bodies are involved, the total length of the job is a sum you cannot fix in advance; only its starting point is yours.
Destination-specific requirements
South Sudan requires consular legalisation, applied for through its officials in Britain once the British certification is complete. Document legalisation for South Sudan therefore runs in a fixed order, with no route around the second body and no way of running the two halves at once. Plan it as a sequence of two waits, and begin the first one earlier than instinct suggests.