I just found this site that has a bunch of BBC Micro games, including The Darkness Of Raven Wood and other text adventures. You can play them online or download them and use an emulator (or, I assume, you can transfer the downloaded ones to an actual BBC Micro somehow…).
The Darkness of Raven Wood seems to only accept one-word or two-word commands.
It’s text + Graphics, but with parser input and static old-school graphics.
Never had a BBC Micro (wrong side of the pond) but it looks like it was a fun beast.