The ACL S24 capacity declaration gives some additional information.
https://www.acl-uk.org/wp-content/up...Capacities.pdf
States stands 2-5 are suitable for 737 6-900, A318-21, MD80-88 and the 757 (not convinced about the latter as it is a Code D aircraft vs Code C for the others, it's pretty irrelevant regardless).
EDIT: actually 2 and 3 and 5J-M and 4 and 5 are 5JW. If W = wide then maybe those stands are a little wider.
jensdad I am also surprised by this. I'm sure even last winter the frequency was more like 21-22 weekly.