The language Sri Lanka asks for
Documents used in Sri Lanka have to be in Sinhala, so a rendering comes before anything else can happen with them. What makes the finished pages worth having, though, is not the Sinhala on its own. It is the signed page at the back, and the order in which those two things get made tells you a great deal about how carefully the work was done.
Check first, certify last
A translator writes the Sinhala, then reads the whole set back against the English before going anywhere near the statement. That order is deliberate. Signing first and proofreading afterwards would put a claim on paper about pages nobody had finished reading, and the value of the certified form lies in somebody standing behind the words as they actually ended up.
What the signed page carries
The statement of accuracy names the translator, gives the date, sets out the two languages and identifies the source sheet it belongs with. An ITI or CIOL qualified certified translator puts a personal name to it, and that credential is what the certified form rests on here. It claims a match between two texts, and the narrowness of the claim is exactly what makes it checkable.
Cost, days and the sheet the work is taken from
At £25 for each side as issued, the price follows the page count, and the read-back is part of that rather than a separate line on the bill. Standard work runs 2–3 business days and express 24 hours, both from readable images. Where the record is a birth, marriage or death entry, Bristol Register Office at The Old Council House, Corn Street, Bristol BS1 1JG issues fresh certified copies, so your own stays put.