I ended up there as well for lunch after a family stroll along the front from Southsea.
Just nipped down to Gunwharf and back.
It's not entirely OT as I ended up getting replacement cycling shoes from the Pearl Izumi outlet for a sensible price. I'd just discovered that my accident had cracked the sole of one of my shoes, something which might have trumped your spannered chain if it'd have gone wrong on the ride.