Twizy useful points
The rear seat takes the old blue Sainbury's boxs perfectly
To secure a bag in the back use a PacSafe Exomesh. See:-
2) Charging points
If the British Gas point is too much then Try Ploughcroft as their point will suit Twizy and above.
You can change the Indicator bulbs your self but have a number of Trox screws and bolts to undo. There is a German Youtube video.
4) Bulbs (2)
SME (LED) Bulbs can be used on the head lights but might not work in the other places according to some reports. LED bulbs would save a little bit of power.
5) Side Windows