One of my best friends owns a similar vessel, a class 200 fast launch , which was defiantly used by T E. Lawrence.
it was originally named " Kathleen" and was requisitioned by the RASC for war used and sent to Blythe. It then was transferred to Northern Ireland ( castle archdale ) to a Sunderland / catalina base. Many people think there is only one of this class left, the one that's been restored and I believe is in a museum now, but there's on lurking in Essex too !