The venue for all warbler/sparrow talks, regardless of the programme, is F02a in Firth court. Directions from Terry:
Enter the main Firth Court entrance. Head past the porters’ lodge and turn left, avoiding the grand staircase in front of you. Take the stairs along the corridor instead and climb 3 flights to F floor. Exit the staircase and you will be roughly adjacent to FO2a. There should be coffee waiting.