The National Living Wage and The National Minimum Wage are set to increase from April 2019:

Year 25 & Over 21 to 24 18 to 20 Under 18 Apprentice
2018 7.83 7.38 5.90 4.20 3.70
2019 8.21 7.70 6.15 4.35 3.90

If you need any further information on the national minimum wage please visit https://www.gov.uk/national-minimum-wage-rates for more information.