Also, a point to note is that they're moving the boundary for 11% NI from about £31K at the moment to match the point at which 40% tax applies.
So, if you earn between ~£31K-£40K you will likely be paying less income tax, but more NI.
Yep, quite interesting that someone earning £40k a year will save about £500 a year in tax but pay about £490 more in NI, so not much difference.

