Their current logo is already pretty idiotic, so unless you want twonks to be patting you on the back and saying 'Make britun back britush' then I'd go with a pic of Farage's latest gurn with the text
YOU CAN'T BARRAGE THE FARAGE SON
YOU CAN'T BARRAGE THE FARAGE SON
YOU CAN'T BARRAGE THE FARAGE SON
Printed below it.