I got my form from the post office.
I went to my local DVLA with my passport, application, photos, payment and prepaid return envelope.
The DVLA person signed the back and submitted the passport, application, photos and envelope to Swansea.
I received my passport and provisional in about a week. I had to sign for the passport at the PO and the provisional came separately straight to my door.
Next I booked a time to do the theory, paid online, I studied and passed.
Once I passed, I started taking lessons with an instructor, more money spent.
I signed up for a exam, paid online and passed and now I am a UK driver.