New 20 MPH speed limit to also apply to bikes in Southwark

Enforcing 20mph isn't going to happen, but if you kill someone with a car while breaking the limit, it should surely have significant implications for sentencing?

http://www.standard.co.uk/news/london/family-of-nineyearold-radwan-uddin-killed-by-speeding-car-say-their-world-has-been-torn-to-pieces-8953485.html

39mph in a 20 zone. The driver's sentence was cut on appeal to 12 months.