Max angle to commence an approach (Europe)

[WASALOADIE]

You would fly outbound from the beacon to a fix (Bearing and distance from the beacon). This would be the DR Fix, then turn to intercept the ILS localiser. Max intercept angle of 45degrees and a max distance on 10Nm from the FAF. This is covered in the Air Law Instrument Approaches part of the syllabus. CAE OAA have better, colour diagrams in their notes. (I used to be SME for Air Law there).
If you take a look at the Instrument approach plate for London Heathrow for runway 27, IIRC the "Ockham" is the IF and the track (something like 065) flies outbound to a fix before turning turning northerly to then intercept the ILS.