Prior to Oxford, IAL had their college in Hayes (c1974), close to Viking House as it was then, at the north west corner of what was Heston Airfield. When we did our Sim course at Viking House(BEA training base), we met some guys from a previous cadet course in a local pub. They'd resigned from NATS at the end of their cadet course as the entire course was posted to LATCC and they wanted to go to airfields, so they joined IAL and were on a course at their college!