The recent rejection of $1.5660/1.5700 has resulted in a loss of the uptrend from the July 8, 9, and 24 lows. In context of the potential longer-term pattern - a that commenced with the break in price on July 7 and subsequent rejection of TL support as resistance on July 15 - it looks like the next leg lower in GBPUSD is beginning.
The key level to watch into the end of the week is ~$1.5460, the swing low in the countertrend rally on July 24. A weekly close below this level would offer a confirmation signal for a move lower (further supported by H4 and daily indicators spilling over into territory). Key levels lower to watch come in at ~$1.5315 and ~$1.5160.
Bears may find risk contained to $1.5635, the pre-BoE "Super Thursday" high in price on August 6. Still, with resistance having established itself in the $1.5660/1.5700 area (as noted in the chart from last week), gains may be difficult to come by on the long side; the path of least resistance is lower.