What is fixed, and what is open
A certified translation into Spanish in Bristol is needed for papers used in Uruguay, because Spanish is the language Uruguayan authorities read. That part is not open to negotiation and neither is the form of certification: a signed certificate of accuracy from a certified translator, of the ATA-or-equivalent standing. Everything after that is a decision, and the decisions belong to you.
There are four of them. Which papers to include. Whether to repair the source before the Spanish is written. Whether to send a copy you already own or order a fresh one. And how fast you want the finished set. Nobody abroad makes those calls on your behalf, so making them badly is what usually costs people a fortnight.
The decision about the source
A certified translation for Uruguay mirrors the paper it was made from. That is a feature, not a limitation: the certificate of accuracy is a statement that nothing changed in the crossing. It also means a flaw in the source survives into the Spanish, so the choice of which copy to hand over is the single most expensive one on this list.
For a birth, marriage or death record, Bristol Register Office at The Old Council House, Corn Street, Bristol BS1 1JG issues certified copies. Ordering one there keeps your own certificate at home and gives the translator a clean, current page to work from. For a company or court paper the same logic holds with whichever body issued it.
Speed, and what the sum comes to
An official Spanish translation in Bristol runs ~£25 / page, and the count is simply the pages you submit. Standard delivery is 2–3 business days from the point the scan is readable; the express route closes that to 24 hours. The wording, the translator's credential and the certificate are identical either way, so speed buys time and nothing more.
Weigh the deadline honestly before you choose. Every certified translation in Bristol for Uruguay that arrives after the appointment has to be redone around a fresh date, and that is worse than paying for the faster lane once. Where the date is soft, standard is fine, and the extra day or two changes nothing about how the file reads in Montevideo.