This line chart is very busy, comparing a few common GBP pairs. I thought it was useful to make this comparison to see what was happening with GBP by keeping the numerator common across the lot.
Overall I find that GBP has been recovering in recent days, as BREXIT approaches. I this phenomenon to occur. It does not mean that GBP will necessarily continue to strengthen after BREXIT. I cannot foretell the future.
High volatility is expected over the next 72 hours. All traders should ensure that their risk management strategies are sharpened up. The only thing you can control is your loss.