Many of these manufacturers (Hawker, Sopwith, Avro) made more aircraft for the RAF than the number of times they are listed. (Hawker made the Hind, Hart, Sopwith made the Snipe, and Avro the Manchester, Anson for example). How are we supposed to know which ones you want?
Good quiz, but needs more planes. If your looking to spice things up a bit, consider mixing American-build aircraft such as the Curtiss Tomahawk/Kittyhawk.