Hi Mike,

Looks to be all associated with fuel carbs and injection.

Take a day out in London with your camera and photo all the pages for free at The National Archives, Kew

http://discovery.nationalarchives.gov.uk/results/r?name=Search&_aq=&_ep=AP+No.+2239A&_or1=&_or2=&_or3=&_nq1=&_nq2=&_nq3=&_cr1=&_cr2=&_cr3=&_dss=range&_sd=&_ed=&_hb=&_ro=any&_rd=&_rsd=&_red=&_st=adv&_rv=

There may be a few other manuals of interest
http://discovery.nationalarchives.gov.uk/details/r/C1199630

Regards
Ross