It's on sale for £495,000 Freehold or £50,000 per annum.

Do you think having a big red X (note) on the map is the best way to show that a pub might reopen?

Personally I would mark it as shop=vacant. 

Also the FHRS ID should be removed as it's no longer trading. It's possible someone could update the FHODOT tool to create a list of newly listed establishments on the FSA website. In English that means every time a new pub opens, we can known.