I baught a 1.5kg crosse & Blackwell Mayonnaise at Checkers Hyper kolonade on 25 August 2018. When I open it last week to use it for the first time it smells sour. The bottle was sealed and I broke the seal once I open the bottle. I tasted it and it has a sour taste aswell. The best before date is 23/01/2019. The manufactioring date is 23/04/2018 19:07 CRB1 10.