Finance, Forex and Investments - Is the exchange rate from dollars to pounds likely to increase for much longer?

Is the exchange rate from dollars to pounds likely to increase for much longer?

I have a cheque in dollars and I am in the UK; I want to know if I should cash it now or wait longer for the exchange rate to be more in my favour.

Let me check my crystal ball...yes, cash is now. A bird in the hand is worth 2 in the bush.