Pakistan works in Urdu
Offices in Pakistan conduct their business in Urdu, so a British record needs an Urdu version travelling with it. A certified translation into Urdu in Birmingham supplies that from a scan. The English sheet is never marked, kept or altered, and the two are handed in together as a pair.
It helps to know how the pair actually gets read. A clerk does not start at the top of your certificate and work down. They start with the block at the bottom of the Urdu, then look at your name, then at the numbers, and only then at what the document says.
The block at the foot of the page
That block carries the translator's name, the date and a plain statement that the Urdu says what the English says. It is a named person accepting responsibility in writing, and it is the whole reason certified work is treated differently from a family member's rendering, however fluent that relative happens to be.
An official Urdu translation in Birmingham is therefore judged first on provenance and only second on prose. That ordering explains a lot of otherwise puzzling rejections: the text was fine, but nothing on the page said who wrote it or when.
Consistency, rate and clock
Consistency across the bundle is the thing you can control before ordering. Dig out any Urdu paperwork you already hold and send it with the scans, so your name is written the way your existing records write it. A certified translation for Pakistan that agrees with your other documents moves faster than one that quietly disagrees.
The rate is roughly £25 a page and the standard wait is 2–4 business days, or 24–48 hours in express. Where a British civil record is part of the file, Birmingham Register Office on Holliday Street issues fresh certified copies of births, marriages and deaths for an official fee.