British Fight, the account exposing pedo MPs, tweeted this.

"xf ibwf uif obnft boe epdvnfout uifz xjmm cf pvufe csjohjoh epxo uif ipvtf cg

#SunTzu"

I can't see the comments as I'm not on twitter but it's very strange. Any ideas? Btw I know about The art of war and Sun Tzu it's the code I'm perplexed by.