Hi Craig,
Thanks for the link. Truth is I don't know what it would like like, as the book I've got (British Steam Tugs) just shows a rectangular block with possible lines across it (maybe just literally a raft to hold onto??) - it is a deck / building plan, not a photo of the actual boat. May go with rounded end one you mention if nobody has any better suggestions. Would they have had inflatable rafts at the end of WWI ?
Thanks
Chris