This issue of Philanthropy UK Quarterly is focused on social impact investment (SII), and features guests columns from some of the most prominent impact investors and advisors.

"In our aim to support and educate we have talked to many experts involved in SII to gain an understanding of the landscape, the challenges and opportunities ahead, and also offer an idea of where donors can play a part. Our case studies illustrate how business, social organisations and philanthropists are coming together to create solutions.

"We recognise SII spans a wide spectrum and incorporates many technical issues, and this magazine is intended as a resource; so dive in and take what’s useful for you, or put it to one side for reference. Don't be intimidated by the unavoidable complexity at times. There are many more resources and advisors who can help, many of which are listed in our magazine.

"Alongside our own reports, we bring word from Europe and America. Melissa A. Berman, president and CEO of Rockefeller Philanthropy Advisors, which is at the vanguard of this new approach in the US, and Serge Raicher, co-founder and chairman of the European Venture Philanthropy Association (EVPA), share useful insight on aspects of social impact investment."