UK mobile operator Three is launching its new Euro Internet Pass today, offering unlimited roaming data to its customers who travel throughout Europe. For £5 ($8) per day, Three customers can use as much data as they like in most European countries, with some exceptions including The Netherlands, Switzerland, and Norway.

The day pass can be activated for £5 ($8) as soon as data roaming is enabled on a handset. Three warns that customers will have to turn off push notifications before the pass is activated from a mobile browser, to avoid out of bundle charges before it's fully active. Once activated, from http://mobile.three.co.uk/europass or an SMS link, the day pass will last until midnight that day UK time. Tethering isn't included in the Euro Internet Pass, and customers will be charged at £1.28 per megabyte if the pass isn't activated or a handset is used in a country where the plan is not supported.

Three has offered similar roaming deals in the past, including Three Like Home — a service that allowed subscribers to use any Three-branded network without having to pay for roaming charges, using inclusive voice, data, and messaging allowances. This latest deal comes just weeks before the European Union's mobile roaming regulation will be extended to include price caps for data. On July 1st, European mobile operators will be forced to charge no more than 70 euro cents (plus VAT) per megabyte for roaming data across Europe.