I think there are significant differences of tone and style between Forest and Blyton/Brazil/etc. Forest, after all, actually has characters making knowing conversation about the school-story convention of 'playing bravely on on the sprained ankle'.

The invocation of the term 'jolly hockey sticks' suggests to me a degree of condescension about the entire genre - the kind of thing Arthur Marshall (http://www.ju90.co.uk/fin.htm) used to be famous for.