Combine two sets of extracted table data

I have two tables. One with all staff (StaffDetailsTbl) and one with staff allocated to projects (AllStaffProjectAllocationTbl). I have a function that someone kindly helped me with (as I'm not so experienced with Excel) to gather all the staff from the AllStaffProjectAllocationTbl that are available after a set date. This also supports filtering the data for discipline, role, employee via a number of dropdown selectors - I'd like to retain this :

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The resulting data looks like the following:

AvailabilityData.JPG

I subsequently realised I needed to include all the staff from the StaffDetailsTbl who weren't on the AllStaffProjectAllocationTbl too. So I created the following to grab all the rows from the StaffDetailsTbl and filter out the matching rows from AllStaffProjectAllocationTbl
whilst also ensuring the staff member has a development role

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to give the following resulting data to the left in the following image:

StaffNotAllocatedToProject.JPG

What I now need to do is somehow combne the left table defined by the filter into the original Let function above. Does anyone know how I would go about this? Or have an alternative approach?

Edit:

I have now attached some sample data with the following comment in S18 on the available staff sheet: I'm looking to merge the two sets of variable data currently defined by A3:E11 and M3:P5 to produce the above defined by S3:V13 whilst also retaining the functionality defined by the Let function in A3.

Welcome to the forum.

There are instructions at the top of the page explaining how to attach your sample workbook. Screenshots are of little practical use as we cannot manipulate them.

A good sample workbook has just 10-20 rows of representative data that has been desensitised. It also has expected results mocked up, worked examples where required, relevant cells highlighted and a few explanatory notes.

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