Very briefly:

Farage received a "gift" of £5M. He didn't tell parliament about the gift, which breaks the rules. MPs or campaigning MPs need to declare gifts and donations, as there are strict rules on who you can receive money from. The media found out about the "gift", and Farage was going to be investigated. He resigned as MP for Clacton, which stops the investigation and triggers an election. I think his plan was for him to win again, and then be able to turn around and say "the people have decided, they don't care about gifts I get." However, all the other parties refused to stand candidates in the upcoming election. If Farage wins, then the investigation will start again. However, we have numerous comedic parties that will run in elections in the UK. Count Binface will challenge Farage. Farage won with something like 46% of the vote last time. With the negative coverage he's been receiving, and the option of sticking it to reform by voting for Count Binface, the people of Clacton might end up delivering a very embarrassing defeat for Farage. This is the country that voted to name a research vessel Boaty McBoatFace.