How safe is Chilli Sauce after the Best Before date?

I found an unopened bottle of Flying Goose hot chilli sauce in the cupboard, it says best before March 2018 but there's no sign of it being 'off' in any way.
It's a large bottle so I'll never use it before then so could anything possibly go wrong with it?

I'd normally just use as much as I need then bin it but it's not on sale here now and it's the best around :(