I’ve just acquired a 1933 ‘Sidcup and District Free Press’ which has a page of adverts for Blackfen. Here are R. E. West hardware stores, Woodlands Post Office and H. E. Rowbottom grocers in what was then called Woodlands Parade, opposite Sycamore Avenue. Plus in the house alongside, the rather fabulous Blackfen School of Music, Dancing and Elocution. The photo is 1934. And lastly, the same view today (2019).
Here is Woodlands Parade in Blackfen Road in 1934 (Sycamore Avenue can just be seen on the left). The house just past the shops had been a private school since 1928, where Mr and Mrs Ashdown ran The Blackfen School of Music, Dancing and Elocution. As well as normal school lessons, there were dancing lessons on Saturday mornings and typing lessons in the evenings. The school was very successful, with regular displays and competitions. Apparently for boys it was THE place to go on Friday nights if you wanted to meet a girl!