SusHack is a free one-day hack day that's taking place on Saturday 27th June 2015, from 9:30am until 6pm (or whenever we finish). . The aim of the hack day isn't to deliver any polished software, but to rapidly take something from an idea through to a working/demonstrable piece of software. SusHack is completely free to attend. We've got the space, food/refreshments and WiFi, all you need to bring is yourself and your laptop.
For more info: http://sushack.co.uk/