This week on Dezeen, installations by Japanese architect Kengo Kuma and British architect and designer Sam Jacobs opened at the V&A museum as part of the London Design Festival.

As part of London Design Festival the V&A played host to a number of installations including a bamboo and carbon-fibre structure called Bamboo Ring designed by Kengo Kuma. The architect hopes that the material will be used to create earthquake-proof buildings.

Also on display is a four-metre cube suspended above a public walkway within the museum. Called Sea Things, Sam Jacobs's installation looks to a future where there is more plastic in the ocean than there are fish.

Other things going on at the design festival included an exhibition of 23 masks at Seeds Gallery, that saw various designers create face-covers from fabric, wood, glass and even a cut-up bottle.

On South Molton Street in central London, designer Camille Walala installed 10 brightly coloured benches, and cube-shaped planters to "inject some colour and light" into the shopping street which previously had no public seating.

In design-industry business news, British lighting manufacturer Plumen revealed that it will cease production of its award-winning Plumen 001 light bulb and that the company is looking for a buyer.

Meanwhile, Italian homeware brand Alessi has sold 40 per cent of the family-owned firm headed by Alberto Alessi to a London-based private equity fund called Oakley Capital.

In other news, we announced five new speakers for Dezeen Day, our inaugural architecture and design conference that will take place at BFI Southbank on 30 September.

Added to the impressive line-up are Dara Huang, Arthur Mamou-Mani, Paul Priestman, Natsai Audrey Chieza and Andrew Morlet.

The announcements followed the Dezeen Awards shortlist party that saw Mamou-Mani join architects, designers and revellers at the Delta Light showroom.

Bridges were big in architecture news this week, literally in the case of The Twist, a spiralling, aluminium-clad art gallery by BIG that spans the river dividing Kistefos sculpture park in Norway.

In the US, architects Payette used overlapping panels of weathering steel to create a 98-metre-long bridge connecting two areas of Northeastern University in Boston. The bridge offers glimpses of the trains that pass beneath.

With climate strikes taking place around the world yesterday, Dezeen live-streamed a summit on the Architecture of Emergency from London's Barbican Centre on Thursday night.

Creative organiser Glug created a digital archive of posters that climate protesters can download for free and carry on marches, whilst numerous UK architects closed their offices for the day to take to the streets.

In architecture news from the US, the long-running saga over housing designed by Kanye West and built on his Calabasas property appeared to come to a close this week. Three of the four dome-like structures have been taken down.

In the New Mexico desert 800 miles away, the Virgin Galactic Gateway to Space building has been fitted out with neutral tones that avoid the "clichés of the space age" by Viewport Studio.

Other popular stories this week included a a $5 million gold toilet that was stolen from Blenheim Palace in the Oxfordshire countryside, a wedding chapel in Australia that will gradually become overgrown with vines and 11 architectural shelters for cats.