Saw these in my local store at Hatfield.
No reason to believe that it's not national.
5 for 99p beats the Tesco and One Stop deals recently posted - just!
I can't stand them myself but bought a couple of boxes for my grown up daughter who loves them.
Store specific offer.
Nationally these are £1.59https://www.aldi.co.uk/cadbury-cr%C3%A8me-eggs/p/063737127995700