<P> The building housed the department store Derry and Toms until 1973 , and then Biba until 1975 . Since the 1980s the garden has been used as a restaurant and club . </P>
<P> The building housed the department store Derry and Toms until 1973 , and then Biba until 1975 . Since the 1980s the garden has been used as a restaurant and club . </P>
when did the roof gardens above kensington open to the public
when did the roof gardens above kensington open to the public
1980s
1980s