No worries, but please check it out to see if it is exactly as per the instructions. Mostly fairly straightforward but not too sure about this instruction in particular.
"L into park, double back to go under Wells Way on cycle tunnel
Into Burgess Park, fork left up to reservoir on the right"
That's great Freezing, I've put that onto the Facebook Events Page. Hope you don't mind.
https://www.facebook.com/events/1607649182829810/