Nice to see another brit here.
I'm not gonna go into details as to why they have 50p/60p, and 25p/30p in ntsc/pal, but just know this. You'll want to shoot 60p and 30p, you'd know if you wanted to shoot 50/25. Extra frames are always nice.
I assume you're fairly new to video cameras? if you're shooting at the fridges and you find the video flickering, it's because of the lights, play with your shutter speed and you'll figure out how to get it to stop, can't remember off the top of my head but you'll know.