Thankfully they are a "quick build" (see below):
- Hawher Hurricane MkI
- Supermarine Spitfire MkI
- Hawker Tempest MkV x 3
The plan is build up the Allied fighters into (multiple) sections of three and the German Fighters into multiple Schwarms of four. Bombers will just have to "come as they please" in dribs and drabs, as building up formations of those is quite painful money, time and effort.