Straight on to blockwork, crack on.
I’d be putting a primer over as a minimum on thermalite block ie 3.5 n, they suck like a hooker on a bonus, otherwise your storing up problems.
Yep there not thermalite, but 3.5 is still a lightweight block so I’d still prime them.
Off topic but how is the owner going to get that garage door open? Is it a roller shutter or just a fake to hide an illegal rental?
On the other hand, don't ask just get the job, money right now matters.