For perspective, 16xx locos were allocated to Thames Valley sheds only in ones or twos. The larger panniers continued to predominate, and by 1950, ordinary 57xx had gained yellow status, so there were no longer any weight-restricted lines (Brentford, Watlington) where only lighter engines could go. I get the impression the 16xx spent their (distinctly unspectacular) days on shunting duties, pottering around and between local yards in close vicinity to their sheds.
By 1960, panniers of all kinds were starting to line up idle in their sheds. The O8s were either taking over or had taken over the yards.