AKA The Hole In The Wall iirc. Due to the entrance being set back inside the arch.
It's seared into my mind because I once avoided being possibly killed by a car by dodging into that alcove.
It used to have a huge collection of enamel faces on the wall inside. There's a word for them but I can't recall it right now.
Became either Deals Of Dover or that second hand toy shop (whatever it was called. Toys Around Again possibly?). Both now also sadly gone.