Complex sentence: However, the maintenance of the ground and the lakes was neglected during the last couple of decades due to a lack of council funding and only recently efforts have been made to restore the park, at least in parts, to its former glory.
Split into simpler sentences: However, the maintenance of the ground and the lakes was neglected during the last couple of decades due to a lack of council funding. In recent years efforts have been made to restore the park, at least in parts, to its former glory.