Data validation list only when cell is FALSE

[Legacy 380435]

Hi there,

I am trying to create a drop down list in P4 that only appears if T4 = False.

T4 is dependant on the answer from D4;
=SUMPRODUCT(--ISNUMBER(SEARCH({"Near Miss","Incident"},D4)))>0

P4 needs to display list "Injury" IF T4 shows False. I have it working in essence, but if T4 comes back as TRUE then i am left with a drop down list that's blank, where i would like this cell to be truly blank with no drop down.

In data validation of P4 i have;
=IF(T4=FALSE,Lists!$G$3:$G$19, " ")

I had named "Lists!$G$3:$G$19" to Injury but regardless i am stuck at this junction, will i need VBA to achieve this?

I look forward to any help in advance haha.

 

[Legacy 380435]

Thanks for the help got it sorted