Elastic{ON} Tour London 2015 was a sell-out event that gathered Elasticsearch, Logstash, and Kibana experts to explore various applications of these technologies across different industries. Jay Chin of Excelian presented a successful grid project for a major investment bank that utilized Elasticsearch for analytics on grid performance, demonstrating the effective collaboration between Excelian and Elastic engineers. The conference featured discussions on the Elastic roadmap, new features of Elasticsearch 2.0, and real-world applications, including media analytics at The Guardian and a search engine at Goldman Sachs. Notable mentions included NASA's use of Elasticsearch for Mars Rover data analysis and the Victoria and Albert Museum's plan to analyze visitor data. The event provided attendees with insights into Elasticsearch's wide-ranging use cases and facilitated networking opportunities, including discussions with Elastic's creator Shay Banon and co-founder Uri Boness on trends and challenges in the financial services industry.