Thank you very much indeed!!!!!! Would have preferred an in-depth technical description though ;-)....
Be careful what you wish for
An anti-roll bars sole purpose is to limit roll by increasing 'roll resistance'. Its useful for cars that need to run soft setups for rough surfaces but want to eliminate the body roll that comes with it. Such surfaces as gravel rallies where you need the softer setup to soak up the rough terrain but want to stop the resulting weight transfer
How they work is tying each individual suspension corner with the opposite with what is essentially a torsion bar. When you corner hard (say right) the body rolls left and the outer wheel (in our case left) starts to disappear into the wheel well and our inside wheel is naturally pushed down to keep tyre contact but also aiding the car to roll more.
With an anti roll bar in place the upward force seen by the outer wheel is transferred by the anti roll bar to the inside wheel pulling it upward also keeping the car level. The force that the outide wheel transfers to the inside wheel depends on the torsional strength of your anti roll bar.
In our case with the micra. Once our cars are properly setup with coilovers I see no need for an anti roll bar. As the roll stiffness is already greater than the lateral G force a micra can plausibly handle.
The story is much the opposite with the rear as having one in place here helps reduce understeer and stops the car increasing its crossweight onto the front outside wheel.
This is not to say go stick the stiffest anti roll bar known to man on the rear and expect fantastic results. Too stiff and the car will oversteer as you reduce contact patch. This is generally where you see a car 'cocking a rear wheel' leaving the remaining outside tyre to deal witg what you throw at it in the corners
Does carry on but that took ages to write so A. I hope you appreciate it
and B. I hope it makes sense