The minimum wage (National Minimum Wage) in the UK vary depending on age.
Adult hourly wage for people aged 22 years and older:
£ 5.05 per hour (at 1 October 2005)
For tr availleurs between 18-21 included:
£ 4.25 per hour (on October 1, 2005). This rate can also be applied to workers over 22 years during their first 6 months in a new job (the employer must be accredited for f rovide training).
There is a slice of £ 3/hour between 16-17yrs (on October 1, 2005).
[Source: http://www.dti.gov.uk/er/nmw/ ]