Professor Noel Lloyd, a member of the Silk Commission, says that even though this opinion poll shows clear support, it won't forget that there are many 'shades of opinion' on devolution.
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Organisers say there will be increased security at the Urdd National Eisteddfod, which began in Bridgend today.
Any remaining heavy or thundery showers will clear eastwards this evening.
Over 70 firefighters are currently tackling the fire, which is now confirmed to be at a scrap yard.