A dip into the LIFE mystery photos (ie, those that are uncaptioned, collected only by subject). These come with the heading "Pai. Train. Royal. College. ". So, painters training at the Royal College [of Art, in London] presumably, and that seems to cover it, more or less. A lot of them are from the 20s, based especially on the hair (the majority of the women have very 1920s bobs), although I'm not sure if they were all taken at the same time; some look rather 40s or early 50s. Anyway though, as always with the LIFE mystery photos, the main point is to just enjoy some swell pictures!
Brooding artist practice (also, the man in front is holding three cigarettes for some reason). Source
Cafeteria time. Source
Just a normal day at the modelling job. Source