In bad weather the link used ILS down to 300m rvr at both Heathrow and Gatwick.
There was also a Decca approach using higher minima and when Gatwick were using 8L occasionally whilst the main runway was worked on the Link could sometimes land when nothing else could due to the VOR minima being higher than the Decca.
The end came following a lengthy enquiry when new routes were approved. Unfortunately the then transport secretary Nicholas Ridley chose not to follow the enquiry recommendations and did not give approval.
Complaints about the link continued years after its demise since part of the route was along the helilanes and of course most traffic was still there!