Page 26 of the Story of the Q1s by John Morgan has a pictire of 33002 at Norwood on 12 September 1952 clearly without the lubricator mechanism. I have just purchased 33023 which again correctly has no outside lubricator in 1959-1960, the period I model. Morgan writes "mechanical lubricators ... were fitted from August 1942 commencing with C 29 (later 30029). 15 of the earlier 28 engines were subsequently retrofitted, hence something like 14 engines remained without lubricator mechanisms throughout their working life. I presume Hornby have got it right for 33002 and 33023.
Hope this helps.
Hope this helps.