Ventile is cotton so its not really warm, as others have said, pick you under garments with care.
I don't own Ventile now, its too expensive for me to justify it to be honest, so I rely on Gortex in the rain (better than Ventile in heavy exposed rain) and wool jumpers/shirts ect. If I had to pick a jacket for woodland camping then I guess logic would say go for Ventile, its quiet, can be warm, windproof etc, but even at my age, I still like to do some open camping here in Wales, so reality would dictate I replace my Gortex Berghaus with a similar product, I hate getting a soaking
If you want winter warmth, go for a down jacket
I picked one up here on the forum, old, but responded well to a dose of downwash, and is just so cozy