I had similar, but just 1 hour.
@Jess same for us! Basically in a classroom style setting and the dietician gave us a talk and demo on how to use the kits
Mine was on my own - was told I'd failed the glucose tolerance test and an appointment was made for the following week to speak to diabetic midwife, collect my kit and speak dietician
I had a group appointment to be told all about GD, spoken to by a dietician on what to eat/not to eat, given the blood glucose level monitoring kit and explained how to use it and had bloods taken - 2 hours total. I assume all areas are different though!