Aftertide is a guided nocturnal audio pilgrimage along the Thames in London, organized by Welkin Theatre. Starting at Blackfriars Millennium Pier, participants wear headphones throughout the 90-minute walk that leads them silently beside and across the river, ending near London Bridge Station. The audio journey interweaves live voices, music, river mythology, and testimony, creating a contemplative atmosphere where memory, survival, and the shifting nighttime cityscape converge. Periodic pauses encourage attentive listening to the sounds and sights of the nocturnal river environment, enhancing the immersive experience of connection between place and story.

This silent, headphone-led format allows participants to focus deeply on the layered narratives and live elements presented, fostering a pilgrimage-like sense of reflection and discovery. By situating the walk after dark, Aftertide highlights the Thames as a living, atmospheric presence, embodying both historical resonance and contemporary urban life. The event is supported by Thames Festival Trust and forms part of a wider exploration of river-themed performance and storytelling in London.