OK, looking at the picture, she looks to be based off of the Condor (Normandie) Vitesse (Hull 044)
If you look you have the big company name, then some more writing on the stern, which is in thre same place as the Brittany Ferries company name (BF Charter her for the Poole-Cherbourg route, and she aslo operates for Condor on the CI route, hence the two companies):
http://www.faktaomfartyg.se/condor_vitesse_1997_b_6.htm