Examples have been tested using Eclipse Neon IDE for Java Developers.
To use the eRS examples you need to have a configured NHS SmartCard reader. This uses a 32 bit dll which means you also require need to use a 32 bit version of Java SDK.
eRS is a simple app to connect to E-Referral Service API, eRSSwagger does the same but uses SpringBoot and includes a simple Swagger interface http://127.0.0.1:8080/index.html