Yes. Seen that site and others of a similar nature. It is a classic case of people accepting unsubstantiated information from the Internet.
You will note from that Merseyside website
"Purdy, mercantile fleet auxiliary, type not known, described as accompanying SS Hollington.
The fact is PURDY is not listed as MFA or any other service. Anywhere. Lloyds, Mercantile Navy list, Navy list you name it she is not there. unless of course I am missing something
If you can direct me to a reference that would explain who or what PURDY was/ is that would be great.