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This photo is from the BBC2 design series: Small Town Gardens. This episode from Ripon, North Yorkshire is from series 3, which went out in autumn 2003, and was presented by James Alexander Sinclair.
The Radio Times entry, courtesy of the BBC Genome project describes it thus:
‘Alice in Wonderland comes to North Yorkshire. A listed town house in a Victorian crescent in Ripon is beautifully maintained but let down by a dull and scruffy front garden. Author Lewis Carroll was a frequent visitor to the house, so designer John Elm cultivates a Wonderland-esque garden, inspired by the surreal topiary of Levens Hall in Cumbria.’ http://genome.ch.bbc.co.uk/54dea337ef8949019ea4bd3c167bb8e8
This episode was directed by Paul Vanezis, and I was the series producer.