​After many years when illustration, design and cartoon strips were his hobby, Grenville became a specialist decorator and muralist and completed assignments and commissions in homes throughout the Cotswolds and London. He also wrote and illustrated articles for two national publications. Among his projects were a large hand painted vase for the Ralph Lauren store in Barcelona and various items of painted furniture.

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A trip to Kenya first sparked his enchantment with wild animals and birds and inspired his current, very popular work which specialises in dramatic animal portraits, often large scale and detailed. He is passionate about telling the story of each creature, accentuating the unusual and celebrating the wildness, dignity and soul of each animal and occasionally placing the animal in off-kilter settings.  The rich narrative of the painting is often further enhanced by its elaborate or traditional framing, matching perfectly with the inventive, decorative backdrops.

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These decorative and interior design skills remain with him – and very much on show – in his paintings of animals, many of which are enhanced and embellished with backgrounds of rich tapestry motifs and medieval-style foliage. His love of heraldry often shines through in clever motifs and touches of symbolism.

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Grenville is a distinctive painter working from his idyllic garden studio in a small village on the Warwickshire/Oxfordshire border.

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Grenville’s work is in private collections in America, Africa, Russia and throughout the UK. He currently exhibits at the Spencer House Gallery, Tetbury, Gloucestershire and the Fosse Gallery in Stow on the Wold.