“There are shocking statistics that air quality can be two-to-five times worse indoors than outdoors and we’ve become sort of habituated to it,” says Oliver.

As modern buildings become more sealed with UPVC windows and bring in more toxic man-made materials, indoor air quality has decreased. Much of these toxins are completely odourless, which means we often don’t realise we’re breathing them in.

Air quality metres can be expensive and hard to get hold of, so Oliver suggests being very conscious of smells in your home that could suggest damp or mould is present.

It’s also important to make sure you’re ventilating your home often. Simple things like opening your windows often and checking your filters and ventilators are working can make a real difference.

It’s also worth doing research when buying new things for your home, so you pick homeware and paint that is free from toxins. Oliver explains that a lot of the things we buy contain volatile organic compounds (VOCs). These gases emitted from many materials like paints, varnishes, building materials, furniture and fabrics are usually harmless individually, but together “creates a cocktail which can irritate us,” says Oliver.

If you do buy new furniture or paint a room, Oliver suggests fully ventilating the room for a few days after to keep the air as fresh as possible.

7 easy ways to make your home healthier for your mental and physical wellbeing