On Jun 19, 7:15 pm, wrote:
It seems to imply there is another line

"(but is not the longest continuous line)"

It was added by an anonymous user last August, so it's probably
********. West Ruislip-Epping is definitely the longest end-to-end
journey, because no other line goes so far out at both ends. Add on
the Hainault Loop (2/3rds the length of the entire Victoria Line), and
nothing can touch it route mileage wise either.

So it's the longest by any metric.

U