E10 gasoline (or Petrol) is a common term for gasoline which has approximately 10% ethanol mixed in as an oxygenating agent. Most vehicles can use this as fuel without issue, especially newer vehicles. The only problem arises when fuel gets above this level into the 15%+ range, as this level of ethanol can start degrading soft parts throughout the fuel management system.
This website is fairly neutral (as far as I can tell) about the debate. Even they suggest, when used correctly, E10 should cause no adverse effects to your vehicle. They state:
Most newer engines can run safely on E10 blends when gas is fresh and of high quality. Some engines are not designed for use of gasahol, and even following all precautions will cause damage. (Check your owner's manual for fuel recommendations).
However, E10 damage is most often due to gasoline "contamination", and would not have occurred had the E10 fuel met all ASTM quality standards.
They go on to say:
In newer engines E10 oxygenated gasoline can be safely used with only minimal inconvenience, such as decrease in mpg and fuel efficiency.
If you stay to the larger fueling chains with a good reputation and at fuel stations which are busy, you shouldn't have an issue. Pay attention to the blend you are using as you won't want to exceed 10% to ensure you are keeping your car safe.