If it will close below 143.7x with a nice red candle, I'll be willing to wait for it to come to lower rectangle border again for short with stop loss of daily ATR + some more pips. I will risk a little and won't put stop loss right away, since it may spike. First target previous lows, final target double top projection.
In other scenario, if 143.7x will hold ... will think of this one later. It may bounce hard and visit previous highs or it may stagnate around this level.
Anyway trading GBP these times when they are voting about something a few times every week is risky in the first place, so no big positions for sure.
Disclaimer: this idea is solely for my own purposes, to satisfy the ego, if it will work out ;)
Nice consolidation analysis.