It depends a lot on your area. I’ve seen mobile prices vary from a cut & blow dry of £50 in London to £10 in the North. It also depends a lot on how much experience you have and how much you charged in the salon?
....but to give you an idea of mine, I’ve been qualified 15 years, work in an affluent area of Greater London and I charge £40 for my cut & blow dry, £65 for my full head of highlights (added onto the cut or just blow dry), £27 for a blow dry and £140+ for wedding hair. Etc