There is nothing specifically about left handed pupils in the new curriculum ...
In Y2 the statutory requirement is
Handwriting
Pupils should be taught to:
form lower-case letters of the correct size relative to one another
start using some of the diagonal and horizontal strokes needed to join letters and understand which letters, when adjacent to one another, are best left unjoined
write capital letters and digits of the correct size, orientation and relationship to one another and to lower case letters
use spacing between words that reflects the size of the letters.
Notes and guidance (non-statutory)
Pupils should revise and practise correct letter formation frequently. They should be taught to write with a joined style as soon as they can form letters securely with the correct orientation.
The basic formation is the same for both right and left handed writers with the exception of cross strokes which left handers should form right to left. A left handed child may find it easier to tilt their book to the right and it's better for them to sit to the left of a right handed child so elbows don't bump