Great thread and have learnt a lot from it. Essentially have a return 4 leg J flight on ANA and ANZ (ARN-AUK). In P class unfortunately. All flights have NH flight number. Have tried various sources on where to credit, but keen to get some advice from experts here.

(1) What is your home airport? All London airports (LHR/LCY). May be moving oz/nz in 18 months.
(2) What types of fares do you usually buy ? P class J fares (never full/flexible fares) for long haul. Mix for short haul.
(3) How many miles do you usually fly each year? 25-50k
(4) Do you have any kind of status at present? What is it? BA Silver, SAS eurobonus Gold
(5) What is most important to you in a FFP?
Lounge and last minute award flights
(6) Which routes do you fly most often
Europe and Oceania
Oz/Nz flights likely to be more common in around 24 months.
(7) Preferred Airlines
No preference
(8) Do you travel for work or pleasure?
Pleasure. Fully flexible on dates etc.

In addition to above i have ~100k virgin miles. I am considering trying to credit all to virgin, but can’t figure out if I’ll get any tier points with them when booked in P. Considering all options particularly for when by BA status goes and never returns in April next year.