Britain's Queen Elizabeth II. [Photo/Agencies]

Born into the age of the flapper, growing up with the frugality of wartime and witnessing the advent of the miniskirt, the Queen has lived through ten different decades of fashion.

For her own part, Elizabeth II is estimated to have worn well over 10,000 outfits to official engagements over her lifetime, created by a series of dedicated designers.

Now a trio of exhibitions by the Royal Collection Trust to mark the monarch's 90th birthday will put more than 150 different outfits on display to the public.