Well I just looked at 5 the years chart & it seems to me that GBP is heading back to 4.30-35 (If broken 4.10 area) though I don't know why.Just a thought.
For that to happen, it needs the Euro to become strong again, combined with investor confidence in the Zloty and a weak Pound.
But virtually every commentator was saying that the Zloty was nowhere near enough to sustain 4.1 - and look what happened, it collapsed to 5.25 within weeks.
For what it's worth, the PLN/GBP rate has always been very unstable.