I can help you a little on 3 of your queries, with the exception of crew names
Mosquito TE809, 605 Sqn Bradwell Bay, flew into a balloon cable at Buntingford. The pilot was able to gain some height and both crew baled out. Date 10/3/44.
Mosquito HP848, 2 Group Support Unit, flew into trees near Collier’s End. Two killed. Date 5/8/44.
Tempest EJ551, 501 Sqn, Bradwell Bay. Engine failure. Abandoned 1 mile E of Standon.
Can’t trace your Hurricane. The one you quoted was transferred to the Admiralty in Sept 1942.
Hope the rest is of some use.