UK mobile operators are scrambling to cut the prices of their international roaming services in what looks like a pre-emptive strike against proposed regulation of the service by the European Commission. Following Orange’s announcement that it would slash EU roaming charges by around 25% last week, rival Vodafone has triggered a price war by announcing plans to cut roaming charges by as much as 40%. Vodafone’s reductions will be based on the average roaming prices from summer 2005 and will be implemented by April 2007 at the latest, it said in a statement. In response T-Mobile UK says it will launch a flat rate roaming service in Europe and North America, which it claims will cut charges by up to 54%. O2 UK is the only one of the country’s four incumbent mobile operators yet to reveal a revamp of its roaming charges, though an announcement is expected shortly. The European Commission said in April that mobile phone operators are overcharging consumers for roaming and is proposing new regulation on roaming to come into effect next year.