This Rohan chair is by Burniture, a UK-based collective that harvests wood from unwanted furniture.

"All of our furniture is made out of scraps that were found on the street, in skips, or donated to us," they write. "This, in combination with batch manufacturing allows us to avoid excess material waste, and each chair to be unique."

"The original source materials [for the Rohan chair] came from an unwanted oak table from Maida Vale and shelves from Shepherd's Bush. The design was inspired by Gerrit Rietveld's Red and Blue Chair and his book on furniture making."

"It is designed with a particular focus on providing lumbar support. We ran several chair testing sessions to get to our final design."

"Due to the fact that we only sustainably source our materials, we will never have a constant supply of the same thickness material pre-machining, and so each batch of chairs will be marginally unique in their depth. Say we find some scaffolding boards which are thicker than shelves, we wouldn't then reduce the boards to the same thickness just for standardisation sake, and to avoid extractor bags full of unnecessary sawdust waste!"

"These chairs are a tongue in cheek take on flat-pack furniture and can be easily dismantled and reconstructed, taken to the beach, to a festival, by a fire, or wherever you see fit."