Why there is no short version
The signed statement behind the work is a claim about a whole sheet: that the Arabic carries what the source carries. Leave lines out and the claim is false, so no one can put a name to it. That is why a certified translation in Southampton for Syria is never sold as a summary, an extract or a gist of the useful parts.
What the whole sheet means in practice
More than the sentences you would read out loud. The printed wording of a form counts, and so do headings, box labels, reference lines, notes on the back and anything in small type. Seals and signatures are recorded where they appear rather than copied. A certified translation into Arabic in Southampton is meant to let a reader work across both sheets without help.
Where you can genuinely cut the cost
The choice you hold is which documents go, not which parts of one go. Papers nobody has asked for can stay at home, and that is the whole of the saving available. Reading the request against your pile, and taking out what it never names, does more for the bill than any attempt to shorten a sheet ever will.
Documents that run to several pages
Schedules, annexes and continuation sheets belong to the document that carries them, so they are counted and rendered with it. Removing one to save a page leaves you holding an official Arabic translation in Southampton of a document that does not match the paper beside it. A reader spotting the mismatch has to send the whole set back.
The rate, the clock and the language
Arabic is fixed by where the papers are going, so the only figures left to plan around are the page rate and the wait. Work is about £25 / page over 3–5 business days, with 48 hours available on the express route. Both clocks measure the language work and nothing that happens before the sheets reach a translator.