Complex sentence: The Government expressed its surprise that after several days warning Colman should have made so little effort to hide them properly: a new pavement had recently been laid in the house, though it is not clear if it was intended as a hiding place.
Split into simpler sentences: The Government expressed its surprise that after several days warning Colman should have made so little effort to hide them properly. A new pavement had recently been laid in the house, though it is not clear if it was intended as a hiding place.