The present invention a high strength aluminium alloy brazing sheet, comprising an Al--Zn core layer and at least one clad layer, the core layer including the following composition (in weight percent): TABLE-US-00001 Zn 1.2 to 5.5 Mg 0.8 to 3.0 Mn 0.1 to 1.0 Cu <0.2 Si <0.35 Fe <0.5 optionally one or more of: TABLE-US-00002 Zr <0.3 Cr <0.3 V <0.3 Ti <0.2 Hf <0.3 Sc <0.5, the balance aluminium and incidental elements and impurities. The clad layer includes an Al--Si based filler alloy and is applied on at least one side of the core layer. The invention relates furthermore to a brazed assembly including such brazing sheet, to the use of such brazing sheet and to method for producing an aluminium alloy brazing sheet.