Playing without data
When you enable the BBC skill in Alexa, it demands you link to your BBC account. However...
1. If you already have the skill enabled, disable it. This will also unlink it.
2. Say to Echo device "Alexa play BBC Radio 4" (or similar). It will ask you if you want to enable the BBC skill.
3. Say "Yes". The skill will be enabled and will work. But it won't be linked to your BBC account.