GBP/USD continues its relentless decline, as can be seen by the move below the key support at 1.6220. Another support stands at 1.6000 (psychological threshold and 50% retracement). Hourly resistances can now be found at 1.6233 (intraday high) and 1.6340 (05/09/2014 high).
In the longer term, prices have collapsed after having reached 4-year highs. The breach of the key support at 1.6220 confirms persistent selling pressures and opens the way for further decline towards the strong support at 1.5855 (12/11/2013 low). A key resistance now stands at 1.6644.