​Trying to cover grey hair can feel like a full-time job sometimes. As soon as you've had your latest colour job, those unwanted roots start to appear again. While some people choose to embrace their greys, others prefer to fight the hair's ageing process  – but according to Wella's colour expert ,Josh Wood, many are making a major mistake.

'A lot of people simply dye their hair back to its original base colour – the shade they were before they started going grey,' explains Josh. 'They do this with no consideration for the fact their base colour has completely changed.' In fact, says Josh, as our hair goes grey our skin tone changes, too. 'As you lose the pigment in your hair, you're also losing pigment in the skin,' he says. 'So actually, the hair colour that suited you when you were younger may not be the best shade for you any more.'

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While the ideal tone won't be a huge shift away from your original shade – you're not suddenly going to go from brunette to blonde, for example – it's certainly worth visiting a colourist to get an expert eye on which colour you should choose. This is the case even if you want to dye your hair at home. Josh recommends visiting your hairdresser to 'build a plan' for colouring your hair. 'Clients worry their hairdresser will tell them off for dyeing their hair at home, but a good colourist will work with you to create a plan that combines salon visits and at-home treatments, taking your availability and budget into account,' he says.

​He says the other main things to consider when covering greys are avoiding flat colour ('multi-tonal is much less ageing') and being realistic about how regularly you can colour your hair – Josh has seen several women who've ruined their locks through constant at-home hair colour, which over-saturates the hair. Looks like it's time for a trip to the colourist then!

What do you think?