What evidences are required for making a "special request" for the PTE exam?

Most UK universities accept IELTS, TOEFL iBT, and PTE Academic. Here are the standard benchmarks for Master's programmes:

IELTS: Overall 6.0 – 7.0 (with no individual band below 5.5 or 6.0 depending on the university).

TOEFL iBT: 79–100 (varies by university).

PTE Academic: 50–65 overall (roughly equiv

Yes. UK accepts the Pearson Test of English (PTE) for work permits - specifically PTE Academic UKVI test. It is a Secure English Language Test (SELT) approved by UK Home Office for Skilled Worker, Health and Care Worker and other visa categories. 

There are several universities in UK that accept low PTE scores - say between 50 to 59. These universities accept these scores for all their Masters and undergraduate programs. Some UK universities accepting PTE scores include University of Essex, Cardiff University, Swansea University, University o

Over 99% of UK universities accept PTE Academic for Masters, including elite educational institutions like Oxford, Cambridge, Imperial College London and LSE. Most universities in the UK require a 57-67+ scores on the PTE exam for their Masters courses while the elite ones require 76+ marks.

The PTE Academic is scored on a scale of 10 to 90 points, based on the Global Scale of English (GSE). The scores reflect your general English proficiency and are holistic judgment of all tasks rather than a simple average.