Fashion in the Roman Period
During the Interregnum and the Period of Anarchy much of the nobility in Logres grow less rich. It's still miles away from the dirty lives of the commoners but even nobility spends less on clothes and more on wars and weapons. Expensive cloth and perfume is almost impossible to get a hold of. Many nobles dress what Uther's time would call "like well of commoners". Clothes from this period usually never go 'out of fashion' per say. But they do errode every every 5-10 years.
Roman Fashion in the Anarchy Period
In cities or at court men wear long tunics and at times a toga over it. The Romans industrious nature makes them survive the hard times of anarchy somewhat with their culture intact.
Women’s fashion changes more than men during the period, but to any significant degree. In cities or at court they wore long and open dresses in light fabric.
Roman slaves wear nothing or very little at all, although the hard british weather forces even the slaves to wear thick woolen clothes.
Cymric Fashion in the Anarchy Period
Since fine cloth is almost impossible to get a hold of most nobles wear practical and sturdy clothes. The richest dress like romans or keep clothes from the Uther Period but most dress in common brown and uncolored clothes.
Women wear simple dresses with belts and a simple piece of cloth over their head.
Men wear tunics and hoses or the same clothes they wear under armor.