The chords are C (Autumn), Em (days), F(grass), G7(jewelled), C(silk), Em(side), F(Chestnut) G7(shell), C(jet) Em(meeting), F(air), \
C(fuelled), D7(things) G7 (well)

chorus: C(get...) C7(get...) F G7 C(say) Em (great) F(thank you) G7(mustn't) C(get)

I run a KS1 and KS2 choir and we are currently doing this in the KS2 one with a few of them playing glockenspiel so my source is the original sheet music. Enjoy :)