I think reducing the age to 21 is a long overdue, it fits with those leaving university and is the age I consider people to be adults.
The reduction in NI % will also benefit this group, who will keep more of their earnings.
What is interesting to me is, as the NMW rises a lot more employers are potentially going to have inadvertent breaches. By that I mean employers paying above NMW thinking we are OK, but in specific circumstances they are not.
NMW compliance is based on the maximum of a single pay period e.g. one calendar month. For those working 37.5 hours Monday to Friday who are paid 1/12 of salary some months may trigger a breach.
Example months can have between 20 and 23 working days.
20 days x 7.5 hours = 150 hours x £11.44 = £1,716.00
23 days x 7.5 hours = 172.5 hours x £11.44 = £1,973.40
£23,500 / 12 = £1,958.34 so months with 23 working days breach even though the annual salary is £1k + more than 37.5 x £11.44 x 52.2 = £22,393.80.
If you are close to NMW and paid monthly my advice is to do a quick calculation.