I had to check, but there is no spot that links upper Newcot Close with Lower Newcot Close. You HAVE to leave the street and come back!! That is very cruel.
Good thing that there *IS* a workaround! [Credit to Oscarette] Summon a friend, said friend goes to the street above you, then you click and follow them. Yay!! Glitch cruelty defeated!! QQuoin grabbed! Thanks Oscar :DD