Simplify the following text for a Grade 9 native English-speaking person.
Original: On 11 August 2009 Ryanair announced it would set up a new base at Leeds Bradford , initially basing two aircraft at the airport offering 17 routes from March 2010 .
Simplified: In August 2009 , Ryanair announced they would open a base at Leeds Bradford Airport , increasing their current 3 routes to 17 .