Explant of 1 year old 255cc moderate profile implants - will I need another lift?

You should have the implants removed and then give your breasts time to recover and heal from the surgery. Your implants aren't very large so I do not anticipate the need for a second lift.

Unfortunately, you have not provided photographs or told us your bra size. However, after implant removal, most patients will have hanging skin and will need a lift. You may only need a small lift. The technique I recommend is a mini lift. Using a circumareola incision, your breast tissue is reshaped, elevated higher on the chest wall and more medial to increase your cleavage.

Best Wishes,

Gary Horndeski, M.D.

Photos would aid immensely in answering your question. The fact that you have smaller implants, I would guess that you may be able to just have an explantation without the need for a lift. A physical exam would answer this question more accurately.
Dr. Taranow