3d) Bulb in yacht replaced by Henry (8) H???I??H
18d) Blast in Norfolk town is off-putting (8) ?I?G?S??
20d) Violent scene involving Channel Islands subject (7) ??I????
23d) Lines cherished by the bravest Anzacs (6) ?T????
29a) Deanery longs to alter main body of church (7,5) ???E??? ??N?D
All help greatly appreciated.