Here, Johnson shares his step-by-step guide to cut long hair at home:

1) Make sure your hair is dried and straightened, as this will ensure the hair is perfectly even. Sit on a balanced chair in front of the mirror.

2) Divide your hair into a parting down the centre of your head, splitting your hair into two.

3) Using a comb, slide your fingers down one half of your hair – keeping the comb level in a horizontal line. It is important you keep your head level and your body still, as any movements can cause an uneven cut. This is why you shouldn’t even cross your legs in the salon chair.

4) Keeping your fingers and comb level, use your chosen scissors – ideally sharper than kitchen ones – and trim the ends of your hair using a point technique. This technique cuts into the hair, not across, leaving the line more forgiving and textured. If you’re feeling confident, trim across for a solid blunt look. But remember, it’s important we only cut the ends, this is a trim, not a cut.

5) Repeat on the other side.

6) To measure whether you’ve achieved an even cut, sit level and close your eyes. This is because our sense of sight can sometimes throw us off.

Run your hands down each side of your head from top to bottom, keeping the hair in-between your fingers and your hands parallel. Your hands should finish at the base of your hair at the same time – this means it’s a balanced cut. If not, don’t panic, just trim the longer side accordingly to meet up.

How to cut your own hair at home: the ultimate guide for all hair lengths