she will get a brp when her application for flr m will be approved. they will send the brp to your address and that serves as your wifes visa.

" 28 days before her visa expires she has to lodge an application to extend her stay (flr m), the HO will then request your wife using a letter to do her biometric on a post office that offers biometric services, when everythings fine and good she will receive a letter to say the application has been approved and the brp follows. "