The idea of using the North London line proved illusory, and it was rejected in 1994 by the then Transport Secretary, John MacGregor, as too difficult to construct and environmentally damaging.
Idéen med at bruge North London Line viste sig at være illusorisk og blev afvist i 1994 af den daværende transportminiseter, John MacGregor, som "svær at anlægge og skadelig for miljøet".