Here is a nut that really does grow well in Britain, though you have to keep a sharp lookout from late August or the squirrels will beat you to it.

A filbert is a large, cultivated variety of hazelnut and a cobnut is a fat, cultivated version. Confusingly the famous Kentish cobnut really is Lambert’s filbert, but such considerations should not stop you swooping on any your greengrocer is enterprising enough to find.

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