Blazon: Per fess azure and gules on a fess wavy between two wings conjoined in base argent surmounted by a sword erect or, in base a lion rampant guardant per fess of the fourth and third, a barrulet wavy of the first
Crest: On a wreath of the colors upon ferns proper a tablot passant sable supporting over the shoulder a post horn or
Supporters: Two griffins or gorged with collars gemel wavy azure charged on the wings with as many seaxes
Mantling: Azure lined argent
Motto: Juncti progrediamur (Let us go forward together)
The wings and sword represent London Airport and the aircraft industry. The lion is from the arms of Hounslow Priory. The fess and barrulet(s) are from the Borough of Brentford and Chiswick, representing the rivers Brent and Thames
The blazon specifies one barrulet, but this depiction shows two. Either the number of the barrulets or the descriptor is off; it could be a barrulet gemel, which would be indicated by the collars on the supporters.