The First Minister, Carwyn Jones, has called for powers over areas like policing, tax and alcohol licensing to be devolved to Wales.
Carwyn Jones made a statement this morning saying "Decisions that affect Wales should only be taken in Wales."
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Local authorities said the move is necessary to "avert the growing number of deaths and increasing harm linked to psychoactive substances".
Sunny and bright spells for most of us this afternoon, feeling pleasantly warm.
North Wales Fire and Rescue Service say incidents of deliberate fires are more common during the school holidays.