GBP/USD Possible short opportunity

I am looking at this move in GBP/USD to be the C wave of an expanded flat correction. I am looking for a little more upside to around the 1.53 to 1.5450 area before shorting for a move to around 1.42. I will have a stop above 1.5552 as a move above here would invalidate this count.

Move below 1.4856 will help confirm the view.