Hi again,
H T & V, H.T Vaughan, Willenhall, Staffs.
CAV, C.A.Vandervell, Acton, London.
H.T & S, dont know, maybe a forum expert can help here.
JC?C, James Cycle Co, Birmingham. Maybe a closer look here would help as very few No 5 grens were maker marked. CAV did so, Norman did give a lot of detail on this in another recent thread on Mills grens. It would be very interesting if its the maker i mentioned as its another one for the record for me.
Would need to see a close up picture of the first grens base plug to help further as to maker and date.
Hope this helps,
Andy