If you’re blonde, you’ve probably heard of purple shampoo and may even have a bottle in your bathroom.

Purple shampoos “absolutely do work”, according to Lisa, but you need to use them sparingly.

The hair colourist said: “If you use them too much, they can make the hair look flat, dull and dry.

“It’s much easier to control the level of the tone being used via a colour corrector drop – this way you can control the brass when, and only when, it’s needed.

“Our corrector drops can be added to your normal shampoo or conditioner, saving you from purchasing another.”

Lisa recommends a thorough four-step routine, it is thorough but doesn’t take lots of time and will keep your hair in excellent condition.