Are you sure it was ex-Lightning radar? As far as I'm aware, the Ferranti AIRPASS AI-23 was only fitted to the lightning; Red Steer was from an earlier generation of radar systems. We were told it came out of old Meteor night fighters, but I don't know whether that was true.
Can't recall the difference between Red Steer 1 and 2. Was Red Steer 1 based on the old AI-20 and Red Steer 2 the ex-Meat Box kit?