Most of the currencies are also on the up (from a low base, USD, EUR, CAD) or near all time highs (SGD, CHF and AUD). The only one which is approaching the bottom is JPY:
So if you were thinking of taking a punt from GBP into JPY, those charts seem to say "hang on a bit, give it another month or two". The message from the simple JPY vs GBP chart for the last five years is "pile in now, it's a good a time as any":
