4: Innovative but pricey roller-ball

Tan-Luxe Wonder Oil in Medium to Dark, £45, tan-luxe.com (Top of model’s right leg)

THEY SAY: The world’s first true oil-based self- tanner with a cooling roller- ball applicator. Slims and stimulates skin to improve elasticity and texture, hydrating for up to 48 hours.

WE SAY: The roller-ball is a fun innovation, but the product drips a little so you need to rub it in carefully as you go along.

They suggest using your hands, but a mitt is a better option as you’re less likely to end up with brown palms.

It feels very moisturising and soft, and gives a good sheen, but as it’s clear when you first apply, it’s hard to see where you’ve done already.

It smells good — like a sweet lemonade — and although it was an oil, it didn’t feel sticky. The colour developed over time to a pleasant golden brown.

At £45 it was more than six times the price of our cheapest tanning product — although on the plus side, it was the only product packaged in a glass bottle, rather than plastic, and would look very elegant on a bathroom shelf.

BEST FOR: Luxury-lovers who want the spa-like feel of an oil-based massage, and hang the cost!