Hello guys

First post so sorry if I miss anything I have a 51 plate 1.25 Ford Fiesta freestyle yesterday we had bad floods near me and I had to choice to drive through about a foot and half of water anyway hours late I got in and drove about half hour home all fine but the next time I went to start it and everything lights up, heaters and wipers come on but it won't turn over no noise or anything, I managed to bump it and run it about 20 miles incase it was the battery but when I stopped it the exact same thing happened again, anyone have any ideas what it could be? Starter motor or ignition switch?

Thanks