Well, I have found another reference:
"Methwold was prepared before the war as Feltwell's satellite........."
"When 57 Squadron reached Feltwell in November 1940 (20.11.40) it soon used it (Methwold) and by 1942 (05.01.42) operations were mounted from Methwold."
"In September 1942, 57 Squadron moved north (to Scampton 04.09.42)."