Trip to local Marshland this morning, spotted a family of Otters so that was really nice. The Pair of Belted Kingfishers continue to mock me... I will take their photo.
So after all my internal debate, the R5 and adapted 100-400 mkii with 1.4TC is my utility go-to for now. The EF 300 mk ii will be the special "monster" for those other times.