Mode S in Class A CTR
Have understood this correctly?
From October this year Mode S will be required for all traffic in classes A-C, so that would include a VFR transit of e.g. the Heathrow CTR.
I'm not sure if everyone's fully aware of that, if so... especially those of us in the Heathrow penumbra, as it were.
Not a problem for the ac I usually fly as A and C has kindly fitted it with Mode S.
Tim