Haven't got any info, but I believe somebody operates a Cessna 172 out of there.
Alternatives: Rougham (grass)
Knetishall ? (Honington MATZ; NOTAM activated)
Old Buckenham (Splendid establishment.)
My son has just informed me that Gt Ashfield is used for vehicle storage (heavy goods) and similar such things. Don't know if runway is likely to be obstructed.