Clapham Common will once again host the annual Colourscape Music Festival after Lambeth Council's Planning Applications Committee unanimously granted conditional planning permission for the temporary event.
The festival, which has been a fixture on the common since 1989, features an immersive, inflatable walkthrough structure designed to create a unique sensory experience with light, colour, sound, and live music. The event is scheduled to take place between September 8 and September 24, 2026.
Officers from Lambeth Council recommended granting permission, noting that the event is temporary, fully reversible, and has no permanent structures or lasting impact on the site. The inflatable walkthrough structure itself is described as a large inflatable labyrinth of interconnected chambers measuring 70m x 60m, with visitor numbers capped at a maximum of 736 persons daily.
While acknowledging a very low level of less than substantial harm
to the Clapham Conservation Area due to temporary enclosures, the officers concluded that this harm was outweighed by significant public benefits. This harm arises from the temporary enclosure of part of the open Common and the presence of structures, which locally reduce openness.
Mitigation measures include the modest extent and short duration of the site, the presence of mature trees for screening, and the proposal being located away from the edges of the Common.
These benefits include the delivery of a high-quality cultural event, a significant educational programme aligned with the National Curriculum, and the promotion of wide community participation in the arts within an accessible public setting. The event is a long-established cultural fixture that provides a unique opportunity for the public to engage with art, music, and education. Furthermore, it supports the local economy by attracting visitors who contribute to additional spending in the area.
Specific mention was made of free workshops for local schools and pupils with special educational needs. The festival features live music performances, often specifically composed to respond to the environment within the inflatable structure, creating soundscapes designed to enhance the sensory experience of shifting light and colour.
Concerns raised by Councillor David Ford regarding past noise issues were addressed by officers, who confirmed there had been no such complaints. The event concludes at 5 pm daily, and music is directed inwards. A supporting sound assessment confirms that noise generated by the event will remain at low levels, with calculations indicating that noise levels at the nearest residential receptors would be approximately 50dB (continuous), well within acceptable limits. All amplified sound shall be contained within the structure and directed internally.
Councillor Viktor Westerdahl's inquiry about the deflation process was met with the assurance that the structure is deflated nightly to allow the grassland to recover. The festival must adhere to approved management plans for waste, noise, and ecology. The applicant is responsible for the clearance and proper disposal of all waste, with no event-generated waste to be disposed of in public park bins. Recycling measures will be implemented, and the site will be cleared of all litter and debris both during and after the event. All waste, refuse, and recycling will be removed from the event site, and the area within 10m of its perimeter, by the end of one day after completion of de-rigging.
Mitigation measures to protect trees, the ground, and ecological features include the installation of tree protection zones, restriction of vehicle movements to existing tarmac paths, and the use of surface-mounted fencing. A site deposit is required to secure reinstatement works, ensuring any damage to grass is repaired through reseeding if necessary. The condition of the grass will be monitored before, during, and after the event, with any wear or damage addressed promptly by the Council's Lambeth Landscapes team.
Specific restrictions on vehicle movements are in place, managed in consultation with the Council's Parks team. All vehicles must enter and exit the site in forward gear, and banksmen will be used when required. Furthermore, no non-road mobile machinery (NRMM) shall be used on the site unless it complies with NRMM Low Emission Zone requirements and has been registered. This is to ensure that air quality is not adversely affected. All vehicles shall use existing tarmac paths to minimise ground disturbance and protect trees and ecological value.
The decision was made by a unanimous vote, with conditions attached including the removal of all temporary structures by September 24, adherence to management plans for waste, noise, and ecology, and restrictions on vehicle movements to protect air quality and the environment. The meeting information can be found in the Public reports pack for the Planning Applications Committee. The agenda frontsheet is also available here.
