Here we have a classic style universal locking choke cable for your classic
.They are very well made, come complete with securing nut and washer and  ideal for replacing a worn original 
It has a wound wire outer cable and a multi strand inner cable, the outer measures 1520mm in length and it requires a 9mm hole to mount it and can be cut down if required.
The knob is black plastic and it has the appearence of an original Leyland part

Does your Carburetor and Fuel System Need a Good Clean
Treat Your Classic to A Little TLC – Click On The Image To Veiw