note added: checked if this 1930 mount was specifically listed in the records. Rather to my surprise I found it without too much of a search and the details of it are as follows:
Model: CS1 Engine number: 49061 Frame Number: 42523 Gearbox Number: 161375 (this is a Vintage three speed LS type box) Forks: W650 (ie TT Webbs) Extras: Two Racing twist grips, TT Large Tanks, Oil Filler on left, Petroflex Pipes, ML Magneto, Specially tuned engine for RD1 (ie alcohol fuel). Despatched 1/8/30 to A L England, East Pennard. Retail customer : H L Daniell, 37 Winn Road, Lee, London SE12, who took delivery 9/8/30.
Quite why Daniell - who I understand was already in the garage business with his brother - obtained the bike through a company in a small village in Somerset, a hundred miles away, I cannot imagine! Incidentally, use of alcohol fuel was permitted in the MGP.
This particular machine seems to form part of a small group possibly despatched in time for the 1930 MGP although they are not lsted as 'Special for Manx Grand Prix' like the '31 machines already featured. The adjacent one with a rather similar specification was despatched to none other than Ron Harris of Maidenhead.