Is it possible to raise the height of a driver’s seat without affecting the warranty or the car’s safety?

Q. I am buying a new Seat Leon 1.4-litre TSI SE. My wife is not very tall and has become used to the slightly elevated driving position in our current Seat Altea
The Sunday Times Driving Placeholder

I need a practical, economical and large family car...

Q. My 2005 Renault Grand Scénic (a 2-litre petrol automatic) has served my family well for four years but is starting to cost a lot as things go...
Seat Altea (2004-2015)

Seat Altea review (2004-2015)

Stylish-looking and talented where it matters, the Seat Altea compact MPV is a versatile family vehicle, despite its age and low public profile.