Hi Hugh
You could add G-BGWP, G-AZOM (Bristow but crashed while on lease to Bond) and G-BGKJ to your list and I am sure there must be others.
As to struggling in the heat I remember a single engined height climb in Tanzania with 5H-MUM.
Geof Croot flying said after a few seconds into the climb "we have established a rate of decent"!!!!!