I applied online. The process took 2 days. I interviewed at Activus (Bristol, England) in Jan 2016
Interview
Interview consisted of two meetings.
The first was a basic interview, introducing yourself and showing you have the relevant skills. The second is a technical meeting with the development manager who asks .NET/C# questions in order to gauge skill.
Both interviews were fairly casual and straightforward. The technical interview asked basic questions which anyone with a reasonable amount of experience in C# would know.