Hi Graham,
I'd age the beers for as follows before bottling , (preferably in an oak cask!)
Pale Ales : a 2-3 month minimum
Bitter Beers: a 1-2 month
Mild Ales , depends on which one , minimum of three weeks though
XP Porter , 1-3 months , Brown Stout 3 months , DBS 3-5 months .
Strong Ales (Old...