The wife's 1.2 silverline Estate has very light steering. It has standard alloys with standard tyres and the pressures are correct. Can it be made heavier [ only a bit though ] Tends to wander a bit......:(

Yes it can. It's just needs an adjustment with VAGCOM to turn down the level of assistance from the electric pump in the power steering.

Usually the Fabia is set with the hardest setting from the factory,