Established shrub, approx 8' tall x 5' wide, wish to prune but afraid may kill it.
No interactions present.
You can prune after it finishes flowering. The recommended method is to take out one third of the branches as low down as you can each year. If you cut back the whole lot, it will recover but you won't get any flowers the next year.
Thanks landgirl and ispot.
Lat/Lng: 51.2, -1.5
OS grid ref: SU3545