Thanks Marcus. I thought I simply couldn't find the "multiple destinations" feature, and therefore had reverted to using the Classic version of Google Maps.
Same.
To get it to work,
Step one: Type in your starting point
Step two: click on "directions"
Step three: Enter in your next destination.
You will now see a + symbol.
Clicking on the plus will allow more then one destination, which you can click and drag to any position just like the old maps