The same letters constitute the ISO basic Latin alphabet.
The exact shape of printed letters varies depending on the typeface (and font). The shape of handwritten letters can differ significantly from the standard printed form (and between individuals), especially when written in cursive style.
Written English has a number of digraphs, but they are not considered separate letters of the alphabet:
The English language was first written in the Anglo-Saxon futhorc runic alphabet, in use from the 5th century. This alphabet was brought to what is now England, along with the proto-form of the language itself, by Anglo-Saxon settlers. Very few examples of this form of written Old English have survived, these being mostly short inscriptions or fragments.