GBPUSD is now testing support - What would you do?

Recent news from England sends the Cable (GBPUSD) back to test the post referendum lows.
GBPUSD is now testing the top of a broken channel - Last time it did that, GBPUSD rallied more than 300 pips.
Would you look to buy GBPUSD based on the structure support and the channel?

OR...
Would you focus more on the H&S pattern that GBPUSD has formed during 2018?