Thanks for all the responses chaps.
In the end, I thought better of messing around with wort that is over 100 degrees C

. I used a tea towel (thanks Darkonnis) dunked in a starsan solution with excess solution squeezed out. I just placed it over the open bits between the lid and the keggle, this also allowed me to agitated the wort around the chiller by moving the ciller up and down as per Skittlebrau’s suggestion. I have to say, you can feel the change in water temperature coming out as soon as the chiller is moved about.