From Collected Poems for Children (Faber & Faber 2005 — https://www.faber.co.uk/9780571215027-collected-poems-for-children.html)
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Gulls are glanced from the lift
Of cliffing air
And left
Loitering in the descending drift,
Or tilt gradient and go
Down steep invisible clefts in the grain
Of air, blading against the blow,
Back-flip, wisp
Over the foam-galled green
Building seas, and they scissor
Tossed spray, shave sheen,
Wing-waltzing their shadows
Over the green hollows,
Or rise again in the wind’s landward rush
And, hurdling the thundering bush,
With the stone wall flung in their faces,
Repeat their graces.