Guys please make sure you check before apply for an English test, confirm with TFL the certificate is good and recognised by them. I have friends who done it with some God knows centres and then TFL said is not good.
They have to do it again after wasting time and money....
There are currently two approved interim English language test providers: Trinity College London and IELTS (International English Language Test System
https://tfl.gov.uk/info-for/taxis-and-private-hire/english-language-requirement