It's not just a queue though, you're supposed to be seated in case of fainting. Many GP practices don't have the space. Maybe different at a large vaccination hub.It's just a queue that lets someone leave every 10 mins isn't it. Needs to just have enough columns to match however many people they can jab in 10 minutes.
This is a huge logistical operation, I hope they get it right, it isn't insurmountable, but competence and forward planning are certainly not something we have excelled at of late.