Singapore April 1941

[SonnySy]

Quite happy to stumble to this thread. As part of a scale modeling Airfix group build aiming to replicate Kallang Airport (in Singapore) as appeared in 1941; I've been tasked to build some ground support vehicles and air defense weapons. Trying to gather as much info as I can before starting, so hopefully someone might be able help:

I. Bren Carriers - judging from the photos in the thread (and the timeline of 1941); would it be safe to assume that there were only Universal Carrier No. 1 Mk 1 in Singapore 1941? Also, knowing that the Mk 1 were not manufactured towing attachements, would it possible that they were field modified to tow equipment? we wanted to show it towing a 40mm bofors anti-aircraft gun.
Also - I'm assuming they were painted Middle Bronze Green (Khaki Green No.3), or was there evidence to the contrary?

II. Bofors gun - did they have them in Singapore? Would they have been painted in Middle Bronze Green (Khaki Green No.3) as well?

III. David Brown Tractor - did the RAF have these in Singapore 1941? would they have painted in the RAF Blue-Grey colour along with the bomb trolleys?
Would it be accurate to have a yellow hood painted as well like in this photo:

IMHO, the tractor in the photo seems to be a later model tractor and obviously the photo is post WW2 as evidenced by the jet fighter in the background.