That poem is lovely in its simplicity, lightness of tread and lyricism (though I disagree with its ending!). With poems like that I might have come to embrace poetry in my misspent youth far more than I did, what with having been burdened by having to study the lugubrious and near-impenetrable longer works of Wordsworth at school. Clare and Wordsworth were near- contemporaries.

I think "Forest Beach" is a reference to High Beach in Epping Forest, where he lived for a few years in a private asylum (he eventually escaped from it and walked for four days to get back to his village). The forest is in the range of nightingales and "redcaps" (likely the birds we call redpolls). Lime trees (lindens of old) grow in the area. They are notorious for dropping honeydew, and you learn not to park your car under one in summer.