Ryanair aircraft change at
NRN (turn EDI-NRN-EDI)
EI-DPI in exchange for EI-DYT
Currently stationed Ryanair aircraft (delivery) [deployment at NRN]:
EI-DAG (17/01/2003) [20/02]
EI-DAO (06/09/2003) [26/02]
new low-cost-livery 
EI-DPB (21/11/2006) [08/02]
EI-DPI (07/02/2007) [03/03]
EI-DPK (16/02/2007) [18/02]
EI-DWP (21/11/2007) [27/02]
EI-DYK (17/04/2008) [25/02]
EI-EBX (28/04/2009) [27/02]
EI-EFW (05/11/2009) [19/02]
-> 8 x regular; 1x backup
As usual all information without guarantee, sources: http://www.libhomeradar.org, http://www.airfleets.net