Do both male & female have the red circles
on their cheeks?

In the normal wildcolour grey, I believe so, yes. But I'm far from an expert... Far from it! I think females have a slightly lighter tint though.

Both males and females will have an orange-red check patch unless they are a whiteface which will be replaced with a little white if female, or will only have a white face mask if male.

It really depends on the mutation. Hen pieds could have a bright red cheek patch and still be female. But most of the time, hens have a slightly duller spot.

Thanks guys... sorted that out...