Test dates - Hornchurch / Brentwood / Barking

Hi! Struggling to get a driving test date, does anyone how far out do you have to wait to get a test date now? Have tried logging on at 6am on Monday on DVLA to no avail.

Can’t swap as I don’t even have a test date to start with to swap with others.

The unofficial route meant that I’ll have to pay over £200 to those who hold test dates. 😢