There's a couple of coffee kickstarters that are worth looking into.
First, Black Chapel Coffee are looking to create an "experimental coffee salon" bringing back hand brewed coffee. This could be similar to Ozone's Clipper Coffee Merchants with its selection of filter coffee. They're looking to raise £2000 to open a spot "South of the River."
Pledge amounts start at £5 which will net you a hand-brewed pour over coffee to £500 which gets free coffee for a year from the shop or the equivalent in roasted coffee (50 bags). Kickstarter link.
Second, Black Sheep Coffee are finally looking to get a permanent spot in Camden. After starting in the Camden Collective, opening up a temporary spot in Old Street Station and on the Camden high-street, they're looking to raise £22,500 to stop having to relocate. Pledge amounts start at £5 with £15 getting your name engraved on a "wall of fame" and a free coffee. For £5,000 you can even have a trip to Colombia or India. Kickstarter link.