Formula to select last number '1' entered and count '0' that follow

Hi everyone,
Fingers crossed and hoping you can help me out here.

I have a Safety Record spreadsheet with departments (columns) and Date/Day (Rows)

We record against each day a ‘0’ if there’s been no incidences, if there has we record a ‘1’

I need a formula that will look at all the data in just one column, pick out the last ‘1’ entered and then count the ‘0’ afterwards.

This is required so each department can print out their respective Safety Record every morning and display on their KPI boards..

I’ve attached our current spreadsheet and as you’ll see the formulas used are not right, each time there’s an incidence the department rep has to change criteria of the formula.

I’ve highlighted in yellow just one column and the corresponding safety record with current formula.

Thank you all for your time, much appreciated in advance.

Mark