It's the Harrow Counter and as you've mis-spelled it that cancels out the earlier.
Harrow On The Hill
Just a moment, the Harrow Counter is invoked only by replacement buses on the Metropolitan Line. Needless to say, you've just pwned yourself by mis-spelling 'Harrow-on-the-Hill'. We're back to where we were. (Sorry you revealed your cheat card, Ben, but it can't be helped.)
Just a moment, the Harrow Counter is invoked only by replacement buses on the Metropolitan Line. Needless to say, you've just pwned yourself by mis-spelling 'Harrow-on-the-Hill'. We're back to where we were. (Sorry you revealed your cheat card, Ben, but it can't be helped.)