Some more Luton history from 1970 in this UK AIP AGA extract.
Interesting. Presumably after 08 departures southwest bound were routed cross radial 39 Bovingdon 3000 feet or below.
Before this they had been routed Brookmans Park, Kilburn, Epsom and Dunsfold.
There was also Brookmans Park, Detling, Cranbrook and Hastings.
Can't remember when these went.
Also like the crossing the M1 motorway bit- how does that work in IFR- time at given speed? Was replaced by DME 9 from Bovingdon I think at some stage.