0.8 non teaching directed time

Thank you to everyone that took the time to read/comment on my post earlier today. I'm now in the throws of working out my directed time as 0.8.

As the inset days fall on Fridays, my day off, they therefore make up most of the 0.2 non-teaching directed hours Im not contracted to work. This essentially means I end up having to do most of the after-school responsibilities on the days I do work. Fulltime benefit from the inset days falling within their working hours and therefore have a reduction in their teaching time to complete ntdt.

This feels really unfair. I have raised it with SLT but so far I'm getting a "that's just how it is" type response.

Any thoughts on this? SLT is suggesting I could work an inset (presumably unpaid) to reduce the after-school responsibilities. Just feels like I'm getting a bit mugged off for having a Friday off....