Thanks for the info.
It's pretty much what I expected to hear but had doubts about recently because of some colleagues responses to the issue. Most pilots tend to ask but quite a few recently informed during or after the turn. Plus it seems to be different even within the same airlines.
It's a bit of a nerve wrecker after you've asked can the heading be kept and you see the aircraft turning off a heading in the useless direction 15Nm out without warning.
