Well it must be progress because my problems with the low E and F have melted away.
I can slur up (some) octaves and I can play up to three-ledger lines E.
I can play Bb with thumb key or two first fingers.
My tone and consistency are improving and I can manage a couple of bars before running out of breath.
I no longer get days when I want to throw the flute out of the window.
I know I still have plenty of work to do but I am beginning to feel I might have made a start!
My next question is about C sharp. After playing a C sharp should I move my RH little finger back to the Eb key straight away for the rest of the notes or can I change back when it is more convenient? If there are several C sharps can I keep my little finger on the Csharp key?