I ended up paying an extra £70 on top of the voucher price for my treatment. It does state it’s an extra £10 for every 10 mls & due to my hair being thick & long an extra 60mls was used on top of the 40mls included in the price, I guess I was charged an extra £10 for long hair supplement. Carly was nice, I feel she was a bit rough when blow drying my hair but she did apologise as she needed to pull my hair taut to dry it properly, I wouldn’t return as it was one of the most expensive I’ve had