Lewis Page has more:
The test launch took place on the landbased steam catapult at US Naval Air Station Lakehurst (also the location of a prototype electromagnetic one of the type the Royal Navy will be compelled to use).
The F-35C is intended to operate from the catapult-equipped fleet carriers of the US Navy and will equip the Royal Navy and the RAF too. The jumpjet F-35B (formerly the chosen British model) will now be delivered only to the US Marines to begin with. The F-35A version, intended for ordinary landbased runway operations, will serve with the US Air Force and many allied nations.