The UK government should consider making more decisions on Northern Ireland at Westminster during Stormont's absence to stop a further decline of public services, a study has said.
Northern Ireland is being governed on a "limited and piecemeal basis" since the collapse of power-sharing as "no-one is in charge", think tank Pivotal warned.
Civil servants are running Stormont departments but there is "no legislative basis" for officials to make many big decisions needed to help ailing public services.