Posted: 15/08/2014 at 07:10
We'd need more detailed photos of the blooms in bud, just opening and open fully, plus time of year when it flowers and other information to identify the variety.
However, the new shoot is just that, a new shoot and is Good News! When the bush is pruned I would prune the new growth lightly and prune the old growth more severely. Pruning stimulates growth so the old growth will grow more strongly and the shape of the bush should even up.
It will be happier if some of the planting around it's base is cleared and some slow-acting fertiliser applied in the early spring.