Greggs – Thornhill, Southampton – Opening Hours & Store Details Greggs is set on Bursledon Road, approximately a 2.85 mile drive east from the centre of Southampton, in Thornhill (near Hinkler Road Bus Stop). This store is perfectly situated to serve people from the locales of Sholing, Thornhill, Hedge End, Newtown, Bitterne, Itchen, Hightown and Harefield. Its hours of business for today (Friday) are 6:00 am – 6:00 pm. Here you can see the hours of operation, store address info and direct phone for Greggs Thornhill, Southampton.