The short road and the chained one
Two arrangements carry British paper abroad. Under the first, one certificate is issued and the file is complete where it stands. Under the second, that certificate is only the opening move, and a desk acting for the destination country adds a further mark afterwards. The difference sits in what the receiving country has agreed to read, not in the document itself.
The second arrangement has a property the first does not: it has an order. Marks are applied in sequence, and each one is applied to the sheet as it stands at that moment, so the later desk needs the earlier desk's work already present on the paper. That single property drives almost everything a sender has to plan for here.
Where Uganda stands
Uganda has not joined the Hague Apostille Convention, so the chained arrangement is the one that applies. An apostille from United Kingdom to Uganda is issued in the ordinary way and does the ordinary job of confirming a signature or seal. What it does not do is put the paper into a state an office in the destination country can act on without more.
It follows that the destination has to be settled at the outset. The route is chosen by the country the paper is going to, and it is not a setting anyone can adjust once a certificate has been attached to the sheet. Naming the destination before the paperwork starts is a planning decision with real consequences, not a formality.
One holder at a time
The sheet itself is the token that moves. While the FCDO Legalisation Office, PO Box 6255, Milton Keynes MK10 1XX, holds it, nobody else is working on the job; that office works by post and has no public counter, so each transfer is a postal leg with a duration of its own. When the marked sheet comes back, the file is halfway rather than nearly done.
This is also why the starting sheet deserves thought. Where the paper is a Northern Ireland birth, marriage or death entry, the General Register Office for Northern Ireland (GRONI) at Colby House, Stranmillis Court, Belfast BT9 5RR issues certified copies. A fresh certified copy can be the sheet that travels, so the record you keep at home never enters the chain at all.
Adding up rather than overlapping
The published British charge is £45 per document by standard post, or £40 per document next-day where the sender is a registered business. It falls on each sheet, so a bundle of three certificates attracts three charges even inside one envelope. That is the single number on this corridor which can be written down in advance with confidence.
Time behaves differently from money here, and noticing the difference is most of the planning. Charges are parallel: every sheet is billed the same way at the same moment. Waits are serial: one desk finishes before the next begins. A sender who budgets by multiplying and schedules by adding has the arithmetic the right way round.
What the sequence asks of you
Because nothing overlaps, the preparation that pays is the preparation finished before the first desk takes the sheet. Read the copy through carefully while it is still only a copy. Decide how many separately marked sheets the receiving side actually needs. Then treat the destination as fixed, since every stage after this one is built on that choice.
The sequence also changes how a delay reads. A stage that runs late does not merely lose its own days; it pushes every later stage back by the same amount, because none of them could have started early in any case. A file crossing two desks behaves less like a queue and more like a relay, and slack has to be built in at the front.