In the 1950s

NDB approach runway 26 (March 1954) - Airfields in the vicinity: Debach, Felixstowe Seaplane Base, Framlingham, Ipswich, Leiston, Martlesham Heath, Mendlesham, Woodbridge (Source: US DoD)

Airfield map (March 1954) (Source: US DoD)
In the 1960s

NDB approach runway 26 (October 1960) (Source: US DoD)

TACAN approach map runway 26 (October 1960) - Apparently the TACAN has been positioned to be used simultaneously for RAF Woodbridge in the southwest. (Source: US DoD)
In the 1990s

RAF Bentwaters on a map of the US Department of Defense from 1993 - The field is shown as closed. (Source: ONC E-2 (1993), Perry-Castañeda Library Map Collection, University of Texas at Austin)
Source for all maps, if not marked otherwise: US Department of Defense (US DoD)