I wait for retest. I'll buy now or later depending on the result of this retest. Level might hold retest - then go long. Level might fail - then wait for the price to reach lower edge of ascendant channel and look for bullinh signals there.
GBPUSD came to a very important vertical level that held it every time it came near for the last 3 years. Will it be different this time? Not sure. Especially now when USD is getting stronger. BTW hedgers were buying it this week while banks were selling. And that supposed to mean something, right? :)