PC Francis Vasko, said: “I would like to speak to any members of the public, local residents or patrons of the First In Last Out pub who may have witnessed the assault.
“If you have any information please get in touch with us and tell us what you know in confidence.”
Two men, aged 28 and 30, both from Winchester, have been arrested on suspicion of assault occassioning actual bodily harm and have been released on police bail pending further enquiries. They are due to return on April 10.
Anyone with information should contact PC Vasko at North Walls police station on 101 or call Crimestoppers, the charity, anonymously on 0800 555 111.
More top news
Thursday morning's weather for the east of the region
Thursday morning's weather for the west of the region
Grammy award winning singer Foxes - hopes to perform the "Most live concerts in twelve hours, in multiple cities."