At 12.15pm a woman in her 50s was knocked to the floor at her home, suffering facial injuries.
It is believed she and her attacker knew each other.
We would now like to speak to Paul Hope, 39, from Preston in connection with the incident.
A spokesman for Lancashire Police said: “This was an unpleasant attack which left the woman shaken and needing hospital treatment.
“We need to speak to Paul Hope and ask if anyone has seen him or knows where he is, please contact us.”
Anyone with information can contact police on 01772 209746 or if they fail to get an answer, 101, quoting log reference 635 of June 25th.
Alternatively, you can contact Crimestoppers anonymously on 0800 555 111 or online at Crimestoppers-uk.org.