Last year we wrote about Urban Gentry‘s specialist tours of London, which included guided expeditions through the city focusing on art, fashion, interiors or shopping. Now recently launched Insider London has added a new niche to the mix with a tour focusing on London’s green side. Insider London’s “Cutting-Edge Green Tour” uses walking and public transport to show participants the most exciting and innovative sustainable retail concepts, buildings and designs that London has to offer. From eco-minded shops to futuristic architecture to inspiring communities, the tour aims to highlight the many innovative ways that sustainability can be brought to life. Lasting three hours, the tour costs GBP 12.50, and is “also an excellent opportunity to meet and network with other keen greens,” the company notes. Led by green marketing strategist Cate Trotter, the Cutting-Edge Green Tour recently won the Love London Travel Award. Insider London’s other tour topics include interior design, architecture, shopping, gay London and the city’s quirky side. With the growing legions of eco-minded consumers out there, focusing a city tour on that niche makes perfect sense. Who will show off other cities’ own eco initiatives…? Perhaps more important, what eco company will be first to sponsor one?