Maverick garden designer Diarmuid Gavin will return to the RHS Chelsea Flower Show in May [2016] with a Heath Robinson-inspired ‘British Eccentrics Garden’.

The Irish showman, who initially found fame on Home Front, has secured sponsorship from exclusive Knightsbridge department store Harrods.

Diarmuid, once lambasted by Chelsea organiser the Royal Horticultural Society for his “nightmare” approach to building show gardens, has been notably absent from the show for the last three years.

The ‘Harrods Eccentric British Garden’ (pictured, inset) will feature terraces and topiary, an octagonal folly and a sunken Italianate pond.

But in true Diarmuid Gavin style, the garden will be full of quirks: every quarter of an hour, it will engage in a “short performance”.

Box balls set amid floral drifts will bob up and down in choreographed movements. Conical bay trees will twirl. Circular beds of herbs around the folly will “dance around the structure” while troughs of planting will rise from the ground.

According to the RHS, a wooden potting shed will “house contraptions created from cogs, wheels, straps and parts of an old bicycle which form machines that will operate mechanical topiary trimming machinery”.

Diarmuid last appeared at Chelsea in 2012, where he won silver-gilt for his 80ft (24m) high Westland Magical Tower Garden.

An RHS spokesman said: “Diarmuid is a talented and popular designer who never fails to wow visitors through horticultural spectacles.

“It is great for gardening to have a showman like Diarmuid on horticulture’s world stage, championing gardening in such an exciting and entertaining way.”