GBPUSD formed a cycle top at 1.6617 on daily chart. The fall from 1.6617 is now treated as resumption of downtrend. Deeper decline could be seen in a couple of weeks, and next target would be at 1.6000 area.
For long term analysis, GBPUSD is in consolidation of uptrend from 1.4230 (2010 low). Range trading between 1.5781 and 1.6745 is expected in next several weeks.