Farage is the current MP for Clacton. He has resigned because he is being investigated for taking massive amounts of dodgy money and not declaring it. He thinks he claimed the upper hand by saying that the voters would decide if that was ok or not, but the other parties have declined to participate. Now, it is a battle between himself and an alien being with a bin for a face.
Notably, if he is re-elected, the Parliamentary Standards Committee will simply continue their investigation into his dodgy finances.
Thanks for the context!