This is very good
https://www.gov.uk/designprinciplesGovernment Digital Service
Design Principles
Listed below are our design principles and examples of how we’ve used them so far. These build on, and add to, our original 7 digital principles.
1 Start with needs*
2 Do less
3 Design with data
4 Do the hard work to make it simple
5 Iterate. Then iterate again.
6 Build for inclusion
7 Understand context
8 Build digital services, not websites
9 Be consistent, not uniform
10 Make things open: it makes things better
--
Karl Dubost
Montréal, QC, Canada
http://www.la-grange.net/karl/