Complex sentence: Barrett has remained critical of the planned Cardiff Bay expansion of "something like 1,250 apartments a year" suggesting it might cause future problems as currently, in 2008, up to one third already built are still not occupied.
Split into simpler sentences: Barrett has remained critical of the planned Cardiff Bay expansion of "something like 1,250 apartments a year". Barrett suggests this might cause future problems as currently, in 2008, up to one third already built are still not occupied.