Two halves of one route
A file bound for Yemen has a British half and a consular half, and the two behave nothing alike. The British half has a named office, a posted address and a published turn: the FCDO Legalisation Office, PO Box 6255, Milton Keynes MK10 1XX, about £45, and 7–10 business days at standard speed. You can plan a schedule around every part of that.
The consular half belongs to the embassy or consulate acting for Yemen. It charges its own fee and works to its own diary, and no British office sets either. People who legalize documents for Yemen often build the whole plan on the British numbers and then get caught out at the end, so leave slack at the tail of the schedule rather than the head.
Where a Scottish paper starts
Scotland keeps its civil register apart from England's, so an Edinburgh birth, marriage or death entry is drawn from Edinburgh Registration Service at City Chambers, 253 High Street, Edinburgh EH1 1YP. What it prints is a certified extract: a full copy of the register entry over the registrar's own signature, and that signature is what the rest of the route works on.
Degrees, court papers and company records begin at whichever body issued them, but the habit is the same. A certified copy makes the journey while the paper you cannot replace stays in the drawer. Embassy legalization for Yemen from Edinburgh is handled by post from end to end, so there is no counter anywhere on the route for you to visit in person.
What these files are usually for
The papers that go this way are rarely commercial. A birth or marriage entry for a family record, a power of attorney so a relative can act on a house or a bank account, a death entry to settle an estate — these are the everyday reasons an Edinburgh household needs a Yemeni file, and they are also the ones people need at short notice.
That matters, because a rushed file is where the mistakes land. A name spelled two ways across two papers, an extract ordered for the wrong year, a signature confirmed on a photocopy instead of the extract itself. Each of those sends the bundle back to the start of a route whose last stage cannot be hurried, so slow care in Edinburgh buys weeks back later.