Spring set and cable stop for Gear Trigger (Pre 2017)

The Brompton derailleur causes the mechanism to return when the lever is released  on a two or six speed Brompton.
This is the set along with dog-leg section and end stop - for pre-2017 derailleur / trigger systems.
This should be added to the derailleur cable if you are after the complete set which was discontinued in 2017.