Some suggestions for wagons:-
Cattle..........................Farish ref 373-270 if you can find it. Peco NR45A or B or C or M
Cement.......................Farish red 377-840 if you find it.
Dairy...........................Dapol 2F-031-011 (Unigate) unless you prefer a different dairy brand
Warehouse/storage.......Farish ref 377-336A or Peco's NR22
I tend to prefer the weathered triple packs hence the comment 'if you can find it' as they are no longer listed on the Farish website but maybe still in some shops.