Closed suddenly in July 2019 but has now reopened. A recent visit (Nov 2021) shows that real ale has been reintroduced. At the bottom of the hill, the Arsenal Tavern is now a back packers hostel but the pub area is unchanged. Needless to say, very busy on match days.
http://islingtonnow.co.uk/islingtons-arsenal-tavern-pub-closes-as-roof-collapses/