This might be weird but the PM thank you in We actually is making me more sure that GA & PM are not dating and just have a professional relationship. It makes sense that he couldve helped out with the book (being the creator of the crown and all) but would be very bizarre if GA was thanking him as her boyfriend and on top of that didnt thank other close family members. Also i am so excited for We to come out and proud of Gillian! Whoop!