BRISTOL SONICS were left to rue missed chances after falling to an agonizing one-point defeat at the hands of Anglo-Welsh rivals South Wales at Whitehall RFC.The Sonics bombed a number of clear chances to score tries and were guilty of numerous sloppy errors as they chased their first victory of their inaugural Conference League 3 campaign.Bristol overcame a slow start to take the initiative early in the second half, but two scores from the visitors with 15 minutes remaining put them back in front. Marcus Brooker’s third try of the afternoon on 77 minutes gave Sonics hope of snatching victory, but the visitors held out in the dying seconds.Bristol Sonics head coach Karl Fearnley said: “I’m obviously very disappointed with the result, but I can’t fault the effort the lads put in. That was our best performance of the season to date and if we keep going like this that first win will come sooner, rather than later. Had it not been for some silly errors today and a lack of composure at key times, we could easily have won this game. All credit to South Wales for digging in and grinding out a win. They did the basics better and that’s what won it for them in the end.”Bristol started brightly, breaking the Hornets’ line in their first set of six, but it was the visitors who took the lead. Centre Jamie Lainge intercepted a loose Lewis Beer pass 40 metres out and sprinted away to touch down.