Does turning off safety systems invalidate insurance in the event of an accident?

My wife has a Citroen C4 Grand Picasso which has various safety systems fitted as standard. My wife turns off the Lane Departure Warning System as she feels its not required. Does turning off any of these...

I had my windscreen replaced and now the lane departure system doesn't work - what's the issue?

I recently hit a bird, which necessitated a new windscreen for my Audi SQ5 as a mater of urgency. I ordered a replacement to be fitted by Auto Windscreens online. However, I got a call the next day saying...

What are the cheapest used cars with lane departure warning?

Some friends were recently involved in an accident and are keen to purchase a used car with some sort of lane departure warning system as a result. Can you recommend the cheapest used cars which have this...