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In page Petts Wood:

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The eponymous wood itself survives and is managed by the National Trust. Originally just 88 acres (36 hectares) were bought by public subscription and donated to the Trust in 1927, after it became clear that the area would be developed for housing.[1] This asset expanded when the neighbouring Hawkwood Estate and Edlmann Wood, comprising a further 250 acres (100 hectares), were donated to the Trust by landowners Robert and Francesca Hall in 1957.[citation needed] The woodland features oak, birch, rowan, alder, ash, hornbeam and sweet chestnut.