Belters! I could only find the hacked about version Arthur the young warlord - apparently the americans bought the rights to it, chopped bits out of each episode and released it a s a "film".
If you haven't seen it and like RoS, you will probably like this . One memorable bit is the treatment of the "Sword in the Stone" shtick. Arthur calls all the other warlords to his Dun and has a huge rock, too heavy for one man to lift, placed on it. In an attempt to show the others that working together is the best plan, he gets them each to put a hand under the stone and lift - he grabs the sword and pulls it out, showing what teamwork can achieve. The others of course go away grumbling and plotting, believing that the incident shows that Arthur would leave them to do all the work while grabing the glory for himself. Its excelent writing and has some great old british actors in it.