I have a a set of nested lookups in forms:

Country

Region (with Country lookup & filter) 

State/County (with Region lookup & filter)

I have another form Profile on which I have a State/County lookup. When a user selects a State/County, I want the associated Region to load into a regular input field.

So if the user selects Nottinghamshire, East Midlands appears in an input field.

As Region is a lookup inside State/County form I can't access it the same way as I would do other fields. Can you help?

Thanks