GBPUSD broke below 1.5272 support, suggesting that the downtrend from 1.6745 (Apr 28, 2011 high) has resumed. Further decline would likely be seen next week, and next target would be at 1.5000 area. Resistance is now at 1.5500, as long as this level holds, downtrend will continue.
For long term analysis, GBPUSD is in downtrend from 1.6745, further fall towards 1.4500 could be seen over the next several months.