Farage is considering quitting smoking because of 'terrible ' back pain . UKIP leader was n't 'firing on all cylinders ' at the start of election campaign . Suffering from flare-up of spinal injury and been prescribed sleeping pills .
Nigel Farage is considering quitting smoking because of 'terrible ' back pain . UKIP leader was n't 'firing on all cylinders ' at the start of election campaign . Suffering from flare-up of spinal injury and been prescribed sleeping pills .