As per the heading, we are getting corrosion on the callipers of our 61 plate fl2 auto. What do I do? Al C

Don't look

Can't see it being a problem, pretty normal Black FL2
L200 Warrior

It is the plating wearing off. It won't cause an issue with brakes.

This is why I never use acid based wheel cleaners as it weakens the plating and eventually removes it. Freelander 2 HSE Lux 2013MY - Barolo Black with Ivory Leather. Alpine DVD - Privacy -Evoque 20" Dynamic Wheels and more to come.........

If it concerns you significantly, then simply remove the wheels and paint them silver with Hammerite/Smoothrite.

Simples!!  Foraging near Gaydon....
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MY13 HSE Lux SD4, Baltic Blue - current, 30,000> miles without fault
MY12 HSE 2.2 SD4, Sumatra Black - gone after 10 months/43,000 fault-free miles