Haven't read the Lovell book but "the Lives of Beryl Markham" (note the title) by Errol Trezebinski is fascninating (and shows how her husbnad at the time (Raoul???) wrote the book for her, and this became an embarassment in later life.
Also recommend "Too Close to the Sun" by Sara Wheeler about Denis Finch Hatton for another angle on this woman and period.
If you had the £££ it sounds to have been a great period (& place) in aviation.
Skua