Interesting comment, Arthurk, as I've read that St John the Evangelist in St Leonards on Sea was damaged during WW2. I've found some 3 storey houses in Church Street, however the photo shows 2 storeys, I think. I haven't included the basement though.
I don't think it's that church - according to various online sources, the tower was one of the few bits that survived the bombing, and it's a rather distinctive octagonal shape.
But I've been having a few more thoughts. Leaving aside the question of how your grandmother came to be visiting a boy's Catholic school on a Saturday in September 1933 (though the nature of her trip might provide a clue as to where else she might have gone), she must have travelled between the locations on either Saturday 16th or Sunday 17th. (I'm assuming the figures in the file name are a date.) So, by train? - Mayfield station was on the line from Eridge (SW of Tunbridge Wells) to Polegate (N of Eastbourne), with connections at the northern end to Tunbridge Wells, Tonbridge, Croydon and south London, and at the southern end to the line running along the coast. Just a small area, then
Anyway, back to the photo: the terraced houses look to be clean and in good condition, so probably fairly recently built. My memory is that a lot of the housing of that type in the coastal towns is older than that, so is this more likely to be commuterland - somewhere in south London?
