Another terrorist attack in London....

Another terrorist attack in London :( In solidarity with the victim and the wounded at the Finsbury Park Mosque, here are the arms of London Borough of Islington.

I am guessing that the arms are blazoned as a barry wavy Argent and Azure, a maltese cross Argent, over all an open book Argent bound Gules; on chief Gules a crescent Or between two bezants voided of the chief.
The crest would a water bouget Sable between an upwards arrow Or

https://en.wikipedia.org/wiki/File:Arms-islington-lb.jpg#/media/File:Arms-islington-lb.jpg

File:Arms-islington-lb.jpg - Wikipedia