Blazon: Azure on a mount in base a Paschal lamb proper; on a chief per pale argent and gules a Saxon crown or between two roses counterchanged barbed and seeded proper
Crest: On a wreath of the colors a two-bladed airscrew in pale winged or surmounted by two swords in saltire points upwards proper
Supporters: On the dexter a lion and on the sinister a stag argent charged on the shoulder with a cross potent quadrate gules
Mantling: Azure lined argent
Motto: Unitas efficit ministerium (Unity accomplishes service)
The borough was formed from a combination of other boroughs, most of which are represented in the achievement. The Paschal lamb and the airscrew are from Hendon; the supporters are from Finchley; the crosses potent quadrate are from Friern Barnet. The red and white roses featured in the arms of both Barnet and East Barnet as a reference to the Battle of Barnet from the Wars of the Roses.
There is so much going on here, and I’m not sure any of it is good. Setting aside the fact that it’s basically impossible to make these arms work within the law of tinctures and the completely unnecessary compartment, my biggest complaint has to be the crest. First, that does NOT look like a propeller. I only figured out it’s supposed to be a two-bladed propeller seen from the front from the blazon. That’s not good. Secondly, it’s a fucking propeller. It’s already an allusion to aviation. You don’t need to put fucking wings on it. Third, I’m going to borrow Fox-Davies’ complaint about more modern crests: they were originally intended to be worn on top of a helmet. How the fuck are you supposed to balance that thing on your head? Would it even be identifiable from a distance? This is such a trainwreck, even the counterchanged reference to the Wars of the Roses isn’t enough to save it.