According to the weekly chart, the top at 1.5933 level has been confirmed for the next few weeks. There is a high probability that this pair to fall below 1.55. So, GBP/USD will be in downtrend for the next weeks.
According to MACD on the daily chart, this pair is in downtrend until at least 50% Fibo level. Even if GBP/USD rises for short term, in medium term can go around 1.5268.