Mick Philpott has admitted hitting a previous girlfriend, but says she deserved it because he claims she hit his children.
Prosecutor Richard Latham claimed Philpott hit his mistress, Lisa Willis, with a stick.
Philpott says he "can't recollect" whether he did or not.
More top news
An estimated 70,000 claimants transferred to Employment and Support Allowance (ESA) from other benefits since 2011 were underpaid.
Plastics is one of a number of environmental issues facing the world's seas, along with rising sea levels and warming oceans.
Winter seeps into spring