These would be great shots but the IQ all round really lets them down for me.
Blue Tits are so difficult to photograph perfectly; and almost impossible when flying so you did well to get these interesting images.
The second one seems particularly strange with wings folded. What is keeping it floating in mid air?
Love the shadows!
I like the shadows as Barbara do in those images. I would try a vertical crop in #2 by leaving only the middle metal bar with the bird ans its shadow.
I would prefer that in #2 you make the metal on each side as the frame...just a thought, Benjy...as you can probably guess, I like framing my subjects. Love what you did in both...