Why? Well we are about to hit the 0.618 at 134.229 (I would say we could reach the 134 before an actual bounce to the upside) which is a strong psychological level based on a huge number of traders who use that level as a reversal level and also because we are expecting data this week.
It is said that there are high probabilities of the Bank of England (BoE) to cut rates by 25 basis points however, the effect of Brexit was not as tremendous as expected and it seems like they've been doing pretty well even after this whole situation so it could be highly expected that they simply hold rates for the time being. If that were to be the case, we would be seeing a major bounce back in the GBP.
Also, after BoJ's decision on Friday which was a total disappointment, we could be expecting Japan to devalue their currency by most probably adding more money to their stimulus (as reported by JPMorgan Stanley that they could cut rates to -0.3% raise Japanese Government Bonds (JGB) purchases to YEN 100 Tln instead of the previous YEN 27 Tln. This would also fuel the bounce back on that lower TL.