We've literally just ordered £700 for next August - three days ago they offered me a rate of 1.95 and today it was 1.8972 - we decided we couldn't wait any longer, and the drop in rate would cost us more than interest we could have earned.
Just waiting to receive the documents to open our US dollar account now, as we are getting married at Disney next year and won't pay til then, so want to secure a good rate now as we have the funds!