I was just looking at their Wikipedia entries:
https://en.wikipedia.org/wiki/Steven_Woolfe
https://en.wikipedia.org/wiki/Mike_Hookem
Woolfe is an ex-lawyer, Hookem is an ex-Commando.
Here's Neil Hamilton's take on things - http://www.independent.co.uk/news/uk/politics/ukip-steven-woolfe-picked-fight-came-off-worse-neil-hamilton-leadership-collapse-punch-latest-a7348271.html