There are lot of extra & hidden charges:
1. They say Treatwell not got the length of hair correct and they need to charge you £10 extra.
2. Tonner is £40 (despite their own website says £10-30).
3. Treatment is another £40.
So, expect to pay £90 on top.
With that in mind I would rather go to a more professional salon.
Antonia made me feel comfortable and did an amazing job with dyeing my hair even though there were 2 tones in it! Will definitely come back again every time