Hi again D-U,
really pleased this has sorted itself out. Must admit my instinct yesterday was we were following the correct Winifred and as you've found elsewhere sometimes dates did vary even in modern/recent times. In fact it was only after she died that we discovered my grandmother had always believed her birthday was four months before it really was, but we've not thought of any logical reason why.

Anyhow, good luck with your continued researches.