What counts as a page
A page here is one side of paper as the office issued it, not a unit of length. Open a marriage entry out flat and you may be holding two. A single sheet with a printed reverse is two as well. Nothing is measured by word count, so a crowded page of court text and a half-empty form sit at the same rate of about £25 a page.
Sizing the job before you commit
Lay every document flat and count sides. That number, times the rate, is the whole translation cost, and it does not move because the wording turns out to be hard. Where a civil record is involved, Leeds Register Office at 2 Great George Street, Leeds LS2 8BA issues fresh certified copies, and a clean reissued sheet scans better than a folded old one.
What the signature adds
Every finished set carries a signed, dated statement from the translator saying the two texts match. That sheet is what turns a certified translation into Azerbaijani in Leeds from ordinary text into something an office will file. It names the person who did the work, so a misread date or a wrong spelling sits with them rather than with you.
What travels together
The finished bundle holds three parts: the new text, a copy of the sheet it was made from, and the signed statement tying the two. Keep them fastened. Split up, a certified translation for Azerbaijan loses the thing that shows which paper it belongs to, and a reader at the far end has no way to match a name to a record.