NatCen Social Research has been developing its internal capabilities in offering a multi-mode solution to its clients. The rationale for using multi-mode solutions in surveys is to maintain high response rates while maximising cost-effectiveness. This paper focuses on the combination of CATI and CAWI using both Blaise and BlaiseIS survey processing platforms. We will focus on one case study and discuss the reasons to why we have adapted this method of data collection. We also demonstrate a method of switching from Blaise Data Entry Program (DEP) to a BlaiseIS Web survey during an interview session. This paper is a reflection of the experience of conducting NatCen’s first WebCATI multi-mode project – The Evaluation of Children’s Centres in England (ECCE).