This year marks the 30th anniversary of the National Garden Festival 1986, which took place in Stoke-on-Trent. I worked at the Festival during a university placement.
I took a lot of photos at the Festival and so far I have uploaded roughly half of them. They are available under the “Photos” menu item, but a selection follows.

JUN86-12 02 - Alton Pagoda (1)

JUN86-12 03 - Staffs Moorlands

JUN86-12 04 - Stapeley Fountain

JUN86-12 05 - Stapely Fish (1)

JUN86-12 06 - Stapely Fish (2)

JUN86-12 07 - Stapely Fish and Fountain

JUN86-12 08 - Stapely Gardens

JUN86-12 09 - Chez Lounge

JUN86-12 10 - Dutch Garden

JUN86-12 11 - Bridgemere (1)
There is a Wikipedia page about The Festival, and this Potteries.org page gives information not seen elsewhere. There is also a page at http://www.christopherellis.net/, and a Flickr album showing the surviving relics, at least as they were in 2011.
A few embedded YouTube videos are below, including the Festival Theme Tune, which I thought I would never hear again.
I have searched high and low for that vocal theme for 30 years, thanks for sharing. I used to have a cassette tape with the instrumental version by the Brighouse and Rastrick I think.