At the beginning of March we launched the Tech4Good Awards 2015 at a very special event at the top of BT Tower in London. We were joined by past winners, supporters, sponsors and judges in a celebration of the success of last year's Award winners SpecialEffect and UCanDoIT, and to inspire new individuals, organisations, charities, schools and universities to enter themselves, their place of work or someone they know, for a Tech4Good Award this year. Here are a selection of photographs taken from the launch event at BT Tower, and you can find video interviews of a selection of past winners, supporters and sponsors of the Awards on the Tech4Good Awards YouTube channel. Visit the Enter Now page and let us know who you should win each of these seven Tech4Good Awards. Nominations close 11 May at 5pm. All photos taken by Sarah Lloyd.