Complex sentence: As part of this, several experimental military aircraft made their first flights from the airfield: the "Westland Witch"; the "Westland F.7/30"; and all of the "Westland-Hill Pterodactyl" series of experimental flying wing aircraft.
Split into simpler sentences: As part of this, several experimental military aircraft made their first flights from the airfield. Amongst them were: the "Westland Yeovil"; the "Westland Witch"; the "Westland F.7/30"; and all of the "Westland-Hill Pterodactyl" series of experimental flying wing aircraft.