What's growing in a park in London

My London home is in Upper Norwood. There is a park nearby - south Norwood - which I have only visited once before. I had always intended going back to see what wild foods are growing there. I am down in London this week so I took the opportunity tonight to visit the park, complete with a picnic. And I found the following growing there: plums, nettles, hawthorn, oak, brambles, rose, elder, raspberries, rowan and wild parsley.

I think I will be making some return visits.
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