Later in July will be School Holiday season so there may be a higher likelihood of delays.

First Question would be is your luggage through checked, ie you don't need to collect between flights. This will make a big difference to how much time you potentially have as you won't need to collect

Second would be, are you connecting from Domestic to International or is it International-International. If it's the former you won't have passport control to go through and without bags you can get to the Hex in 15 mins from getting of the plane. If it's International you would need to clear passport control which again could take a considerable amount of time.

​​​​​​​Coming back through security do you have fast track for this. If you do venture out would aim to be back at T5 in good time to make it