When I was invlved in things technical, I asked about brake fans inthe original spec to assist with the short turn round times, and was assured that they WERE to be fitted.
As crew food was on its way out in the eyes of senior management, ovens were NOT going to be fitted, but due to pressure crew food was retained, and the single oven reinstated.
As the spec has changed, it may be that this also happened in relation to the brake fans.
I have since left all things technical, and don't know.