You definitely know some people !
I’ve just seen your other thread , your clearly talking to people the rest of us don’t , which baroness is it lol 
Pete S:
Perhaps this helps?Some rules about learning to drive an HGV and bus or coach are going to change on 15 November 2021 (subject to Parliamentary approval). The changes affect:
what you’re allowed to learn to drive and take your driving test in
how the driving test works
What you can learn to drive and take your driving test in
Lorries
You currently have to learn to drive and pass a driving test in a large rigid lorry (category C) before you can learn to drive and take a test in a large articulated lorry (category CE).The law is going to change so that you’ll be able to:
learn to drive in an articulated lorry when you get your first provisional lorry licence from 15 November 2021 (if you already have a provisional licence, you’ll need to take extra steps to upgrade your provisional licence)
take your test in a large articulated lorry without having to pass one in a large rigid lorry first
You’ll still be able to learn to drive and take a driving test in a large rigid lorry (category C) if you do not want to drive anything larger.When you pass your test in a large articulated lorry, you’ll then be allowed to drive:
a medium-sized lorry (C1)
a medium-sized lorry towing a trailer (C1E)
a large rigid lorry (C)
a large articulated lorry (CE)
Medium-sized lorries
This change will also apply to medium-sized lorries towing a trailer (category C1E).This means you’ll be able to learn to drive a medium-sized lorry towing a trailer (category C1E) and take your test in one, without having to pass a test in a medium-sized lorry (category C1) first.
When you pass your test in a medium-sized lorry towing a trailer, you’ll then be allowed to drive:
a medium-sized lorry (C1)
a medium-sized lorry towing a trailer (C1E)
Buses and coaches
You currently have to learn to drive and pass a driving test in a bus or coach (category D) before you can learn to drive and take a test in a bus or coach towing a trailer (category DE).The law is going to change so that you’ll be able to:
learn to drive in a bus or coach towing a trailer when you get your first provisional bus licence from 15 November 2021 (if you already have a provisional licence, you’ll need to take extra steps to upgrade your provisional licence)
take your test in a bus or coach towing a trailer without having to pass one in just a bus or coach first
You’ll still be able to learn to drive and take a driving test in a bus or coach (category D) if you do not want to tow trailers.When you pass your test in a bus or coach towing a trailer, you’ll then be allowed to drive:
a minibus (D1)
a minibus towing a trailer (D1E)
a bus or coach (D)
a bus or coach towing a trailer (DE)
Minibuses
This change will also apply to minibuses towing a trailer (category D1E).This means you’ll be able to learn to drive a minibus towing a trailer (category D1E) and take your test in one, without having to pass a test in just a minibus (category D1) first.
When you pass your test in a minibus towing a trailer, you’ll then be allowed to drive:
a minibus (D1)