The free roaming service from Three is called "Feel at home".
The good news is that it can be even cheaper than what you mention, as it is available on pay-as-you-go tariffs as well.
The bad news is that there are some limitations on tethering abroad, and you do need to use your SIM in your home country at least once every 3 months. So it's not quite yet a situation where you can pick any cheap European provider and use them anywhere else in Europe without restrictions.
Comments
The free roaming service from Three is called "Feel at home".
The good news is that it can be even cheaper than what you mention, as it is available on pay-as-you-go tariffs as well.
The bad news is that there are some limitations on tethering abroad, and you do need to use your SIM in your home country at least once every 3 months. So it's not quite yet a situation where you can pick any cheap European provider and use them anywhere else in Europe without restrictions.
About tethering restrictions: I would have hoped network neutrality would forbid those as well. Probably not though.