In forum, someone told me from the UK, that this story means "dignitaries", say someone like the Princes and so on, would be boycotting. It does not mean the national team of England would be boycotting.
"Boris Johnson has said British officials may boycott the World Cup..."
So, maybe individuals read that in about that it would be the higher ups that would not go to the Russian World Cup; but I certainly did not know this. Just for any soccer fans.