callsign queries
Two queries I wonder if anyone can help me with:
1) Is there any rationale behind Lufthansa callsigns into LHR? Are they in any way related to their departure point and why do some flights retain a numeric callsign, whilst the majority are alphanumeric?
2) What does a papa (P) stand for at the end of a callsign? I've noticed this especially with unscheduled VS flights into Heathrow and after the BA Gategourmet strike loads of flights the next day (clearly out of place) were coming in with papa at the end of their callsigns.
Thanks,
MM