The green lining in the slot booking calendar just shows the next three days by default. If you select another date, the green line will appear around the date you’ve selected and the following three days.
The dates shown in white are the dates with delivery slots available. Please select one of these dates if you would like to book a delivery for then. Any dates shown in grey are those with no delivery slots currently available to book. If there are no dates available when you log on to book a slot, we advise you to check back again later. We are releasing extra slots where possible.
Here’s a short video walkthrough of how to book a slot: