GBP/USD first support at mid-March lows at 1.4055/50 of course. Again, if we continue lower look for 1.4030, then this week's low at 1.4004. There, only minor support below at 1.3985/80, and further losses target 1.3949/45 then 1.3915/05.
First resistance at 1.4090/1.4100, but above here meets stronger resistance at 1.4175/85, which could therefore see a high for the day. However, shorts need stops above 1.4210. A break higher sees 1.4175 act as good support to target quite strong resistance at 1.4255/60, but shorts here need stops above 1.4290.