Use a sheet of mirror as an underlay for a wall trellis or decorative fence. Choose a natural, textured structure such as woven willow or hazel, chestnut palings or even a fine, old, wrought-iron gate, and plant scramblers and climbers that are not too dense – roses, clematis and honeysuckle – so you can still see the glint of the mirror behind.
Acrylic mirror sheets would work well here too, and better still when used as veneers for the front of a raised bed or the risers of your garden steps, creating dashes of mirrored light at ground level. The acrylic is shatterproof and lightweight, so it’s safe from stray cricket balls.
Finally, keep an eye out for salvaged architectural pieces that are already mirror-glazed. Candle wall sconces are classics, or for something more unique, you might like a mirrored sundial – both of which I've spotted at The Decorative Antiques & Textiles Fair in Battersea Park over the years. Who says mirrors have to be on a wall, after all?