difference between 'not one' and 'not a one"

[subhajit123]

Are both the following sentencess correct? if yes, then what's difference?

1- Glasgow Primary School has 222 pupils and not a one is scottish

2- Glasgow Primary School has 222 pupils and not one is Scottish.

 

[Rover_KE]

You could add emphasis by saying '... and not a single one is Scottish'.