Returning to work

Hi ladies. Could someone help me please? I need to work out whether it would be beneficial for me to return to work 4 days instead of 5 and I’d like help to calculate my salary. At the moment I’m on U1 in London Fringe so £47,031. If I was to drop to 4 days, what would that become and would my tax bracket change? What would be my gross pay and what would be my take home pay? Thanks so much in advance 😊