These are the old and new EU tests that measure a car’s fuel consumption and CO2 and pollutant emissions. The government uses them to work out road tax rates. But if you drive an EV (not a hybrid) the tests won’t affect you as your car doesn’t have any emissions.
NEDC was the New European Driving Cycle. It’s a test that’s been around since the 1980s. But the EU is replacing it with the Worldwide Harmonised Light Vehicle Test Procedure (WLTP) laboratory test.
If you like reading up on emissions testing, here’s the link.