It seems that none of the forum members lived in the Avenues.
We lived nearby, Kingsway, and for many years I cycled to school on Plessey Rd. (BGS) via 10th and 12th Ave.
The houses were well built, with small gardens. Altogether a very pleasant estate. And not much different in the 90s when I walked through the ?north end from the bus on Plessey Rd., to Broadway, where Mum lived.
But I've no idea why those 2 numbers were omitted. It would need some info from the council records of the 1920s to find out.