Friday evening, the 5th of May - 8:30 to 9:30 BST
With Dr Iain Boulton of Lambeth Council
Bat detectors will be supplied.
We will meet at the middle of the three gates to the park on Ferndene Road SE24 0AB.
Please be sure to arrive by 8.30 pm.
And please register at eventbrite to reserve a spot - places limited