Admin tab slow to load for some organisations

All the sub tabs of the admin tab are slow to load for some organisations ( particularly National Schools which has a large number of clubs ).

Seems to caused by slowness in one of the status queries. So National Schools is slow because it has more players and more fixtures.

Could be slow access queries.
Might be possible to help by caching access to urls, and then clearing cache as access changed.

1) League Access could cache its queries in the object by accessType and object id, to avoid issuing the same query twice.
2) The route access caching could be used, if I can figure out how to clear it - or the appropriate cache tags when updating somebodies access.