In addition to 223, yesterday marked the debut of Trident 352. It is out again today noted running out of service up North Promenade, probably to work the 0944 route 9 from Cleveleys. 345-351 have all been observed on service 1 today.
Yesterday also saw 312 in service in its new advert for the Blackpool Tower Eye as captured in these two flickr photos (front; rear). Both 312 and 313 have lost their side advert frames for these vinyls. 313 has been almost universally used on route 1 and it remains to be seen if 312 follows.