Complex sentence: The Stratton Bank stand makes up the remaining 2,200 of the away allocation, but is only really needed for big games (Local Derbies, Big league, cup games) or for larger clubs with big away support.
Split into simpler sentences: The Stratton Bank stand makes up the remaining 2,200 of the away allocation. Although, is only really needed for big games (Local Derbys, Big league/cup games) or for larger clubs with big away support.