Hello friends,
I have observed for a while the use of the idiom 'as and when due'.
It is quite appalling that even mainstream media in Nigeria rarely uses the correct form of the idiom 'as and when due'.
You hear and read most times people saying and writing 'as at when due'.
Please note, the correct way of saying something is done the way it should be done and at the right time is 'as and when due' and not 'as at when due'.

Thanks.

thank u