PowerPivot - Timings ignoring down hours from another table

Hello,

I am trying to create a formulae in powerpivot that calculates time between two date/times, ignoring hours which are down hours

i.e.

If Start Time was 04/01/2018 05:53:00 and End Time was 05/01/2018 07:33:00 the answer should be 1060 minutes.

Attached is the table. Ideally i would want to do this is PowerPivot opposed to normal formula. I hope it will be simpler anyway.

EDIT - To confirm, any hours in the second table that has a No shouldnt be counted in the time function.

Thanks in advance

Harvey