Hi
Sorry I can't help with any individual, but the pub shown behind the charabanc is very likely to be the White Hart - the bay window immediately behind the vehicle is, I think still there, and certainly other sources show it as a Baddow Brewery house around 1900. Also the vehicle has an HJ registration which is/was an Essex series.
The school photograph looks as if it was posed outside the old school in Church Road, part of which at least was constructed from/cladded with corrugated metal sheeting. I remember it being the library and scout hut in the 1960s.
If you can get a copy, Terry Babbington's book Thundersley a Pictorial History has a number of 1920s photographs including the school with some of the individuals named which may help