Suzanne Evans said she would step in if Farage quits because of ill health . Ukip leader is suffering from a recurring spinal injury and is on medication . The party has been hit by infighting over the past few months as its members have become increasingly frustrated with Mr Nuttall. The party 's deputy chairman wrote Ukip 's general election manifesto .
Suzanne Evans said she would step in if Farage quits because of ill health . Ukip leader is suffering from a recurring spinal injury and is on medication . But Miss Evans , seen as a rising star , played down his medical problems . The party 's deputy chairman wrote Ukip 's general election manifesto .