Wrong Reg - Stagecoach Enviro 400 19040

It is reported that SN56 AWM Stagecoach Merseyside and Lancashire Alexander Dennis Enviro 400 Trident 19040 H47/34F, is operating with an incorrect front number plate.  At some point the front number plate has been replaced with the incorrect number of SN56 AWN, whilst the rear one still retains the correct detail. 
SN56 AWM was new to Stagecoach North East in 2006 and initially based in Newcastle.

 The bus is seen at Preston Bus Station in January 2014 carrying the incorrect front number plate.

Thanks to Gregg Collins for the information and picture. Gregg has an excellent Flickr website here which is continually updated with some interesting material.