The answer to the first part of the question is given in the following table. I have no information as regards the second part of the question.
Number of pupils who left Public Elementary Schools maintained by the London County Council.
Year ended Number who left for Further Education aged 14 years and over. Number who left for reasons other than Further Education on or after attaining age of exemption. 31st March, 1934. 975 55,010 31st March, 1935. 1,069 55,564 31st March, 1936. 1,117 52,649