Standard light connector

Anyone who does DIY and installs new lights will know as soon as you unscrew the old light fitting you'll see a mass of wires and a connection block. Often due to the way UK ring-main works (6 wires) and then if you have a spur then there are 9 in total. Quite a mess to then try and connect in 3 wires for the new light fitting.

Therefore, what I would like to see is a standard, compact in-line connector, as is common in car lighting. The design needs to be safe, and have different shaped plastic (curve on one side etc) so it can only be inserted with the Earth, Live, Neutral connected correctly.