The NewEng script (mine, not another by the same name), includes all 26 English alphabet letters, plus another 15 borrowed from other scripts and eras.
A Æ B C Ç D E F Φ Þ Đ G Ȝ H Ƕ I J K Ʞ L M N И Ŋ O Œ P Q R S Ʃ T Ч U Ȣ V W Ꝏ/Ѡ X Y Z
a æ b c ç d e f φ þ ð g ȝ h ƕ i j k ʞ l m n и ŋ o œ p q r s ʃ t ч u ȣ v w ꝏ/ѡ x y z
NewEng alphabet, with gaps for missing glyphs (ƕ, и, œ, ꝏ)
Diacritics
These are pretty messy right now. ǣ and ȣ̄ were not considered at all.