The group looking into the disappearance is The International Group for Historic Aircraft Recovery, TIGHAR (pronounced “tiger”) – https://tighar.org. It’s a non-profit foundation that is dedicated to promoting responsible aviation archaeology and historic preservation. Link to the project: https://tighar.org/Projects/GlennMiller/glennmiller.html. They went to England in December 2018.
For additional information:
People: Glenn Miller’s Airplane Possibly Found Decades After Famed Bandleader Vanished During WWII
BBC: Glenn Miller Possible crash site investigated by US team
WW2DB: Glenn Miller