AS many women will no doubt be aware, they are routinely charged more than their male counterparts for a whole range of products and services, including toiletries, clothes, hairdressing and even dry cleaning.

And it would appear the so-called pink tax extends into every sphere of society - even our prisons.

A recent report by Her Majesty’s Inspectorate of Prisons for Scotland into facilities at Polmont, where Scotland’s female prison population is currently housed, noted a lack of affordable toiletries - such as shampoo and conditioner - available for sale to women prisoners. All those in custody can buy certain products on “canteen lists” using money given to them by family, or earned from work in prison.

The Fawcett Society, which campaigns for equality for women, has long been highly critical of what it calls “sexist” pricing, and is particularly dismayed that the phenomenon has seemingly made its way from supermarkets into prisons. It has urged the Scottish Prison Service (SPS) to lead the way by making the pricing structure the same for male and female prisoners.

For its part, the SPS says its pricing structure simply reflects what it is charged to buy in the products, and thus any higher prices for “female” products must be passed on to women prisoners.

No doubt there are many more serious issues in our prisons than the cost of shampoo. But the situation does highlight a wider issue in society that surely needs more examination, particularly since the gender pay gap still exists and persists across employment sectors.

An investigation last year, meanwhile, highlighted that on average women pay 37 per cent more for “gender-targeted” items ranging from beauty products to toys. Prices for women’s razors were found to among the most inflated, simply because the products were pink. Following this, Tesco reduced the price of its standard razors by half to match that of its men’s range.

Perhaps it’s time more big companies took similar action, and encouraged their suppliers to do the same. Until then, women will continue to be ripped off.