Flowering Orange Blossom

The Orange Blossom bush is some 10yrs old and its grown quite large and sparsely etc.
Its never been pruned back to tidy it back into some shape.
So can these be pruned to get some shape/tidy up.

 

Usually you should cut back hard old stems after flowering, as I remember they flower on the previous years growth so any cutting back now will lose next year's flowers.