Any Beckerage, Thrush or Dollis Hill
may be countered with an Ongar Denial between 10 PM and 1:30 AM (game time). Doing this, however, places the entire game into immediate Strick, and allows a free shunt to Golders Green. The reasons for this are lost in time.
Note that the Ongar Denial is not to be confused (although it frequently is) with the Ongar Denail, which is an entirely different thing.