Geektastic: Swain, Adeney & Brigg.
Where else does a gentleman buy umbrellas?
Since you are asking: Fulton, the Queens umbrella.
Have stood up pretty well to Wellington weather so far, and was bought in Edinburgh on a less than calm day after just having wrecked a cheap umbrella.
Rebel Sport sell Gustbusters which are good - https://www.rebelsport.co.nz/product/8080683/gustbuster-metro-umbrella-black/