Amongst the first operators of the Irizar PB2000 on National Express workings was First Coaches. 23304 (YN54NXW) is seen leaving Heathrow Bus Station in February 2006 on the Worcester - London route 412. Note that this model does not feature the destination box introduced in 2005.
Seen on the same day is a newer PB2000, YN55PXE, with the roof box and operated by Travel West Midlands on the 210 back to Birmingham from Heathrow.
An unidentified Scania/Irizar on the M40 at High Wycombe in May 2005.