The short term GBPUSD pattern is at odds with the other USD crosses, thus confidence is low in direction. Bigger picture, wave 4 within the 5 wave decline from the 2007 high (2.1160) is probably still underway. 1.5735, the confluence of the 38.2% of the decline from 2.0162 / December 2008 high, seems a likely target. This level intersects with a resistance line at the end of May.
