Just received an email from RWG launching their new travel sim solely for use within the EU so NO UK use, 30 days or 1 year useage.
100GB £30
50GB £20
20GB £12
10GB £7
Looks like you can use all of the data allowance also
Travel SIMs & Bundles
Our travel SIMs and bundles are new to the market and run separately from our add-ons. They operate in the EU Only so don't include UK Data meaning we can offer more competitive pricing. These packages operate in all 27 countries of the European Union plus Switzerland so include popular holiday...
www.rwgmobile.wales
100GB £30
50GB £20
20GB £12
10GB £7
Looks like you can use all of the data allowance also