can you freeze creme anglaise?

Instead of making creme anglaise, I just melt a premium vanilla ice cream, so I'd say the answer to your question is "yes."

Ice cream is made from a custard that, without additional flavors added, is creme anglaise. It's the process of spinning the anglaise in an ice cream maker that creates ice cream by slowly whipping air into the custard as it freezes. Given that, I don't see any reason you can't freeze your creme anglaise.

You may just get ice cream.