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.
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The Prince and Princess will be treated to a petting zoo and a puppet show along with the children of local military families.
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Senior lawyer Elizabeth Prochaska has left her position as junior counsel.