The Last Survivor?

Actually, at least two M.L.'s still exist!

One, currently known as Cherokee is owned by an artist Charles Curran. Cherokee is in a poor, nearly gone condition and is being used by Mr. Curran as a source for materials in his artwork. A few photographs of her are available here (he mistakenly notes her as being a sub-hunter from World War Two, nor would she have had H.M.S. in her name. M.L.'s were formally named H.M.M.L.). It's not clear which M.L. she started life as. I hope some more research with Mr. Curran may provide an answer.

The Dunkirk Little Ship Eothen (previously called Cordon Rouge) started life as M.L. 286 and is still afloat today at Isleworth on the Thames. She has been modified from her original war-time configuration, perhaps extensively, but still offers some good close-up photographic details. Sadly, she is clearly in a precarious state and may not last much longer before being broken up.

Eothen's wheel (M.L. 286).
Note the telegraph and binnacle still in place.
Photograph by B.J. Woods
from The Association of Dunkirk Little Ships.
Used by permission.
  
Eothen (M.L. 286).
In need of some TLC.
Photograph by B.J. Woods
from The Association of Dunkirk Little Ships.
Used by permission.
A stern view of Eothen (M.L. 286).
The aft skylight would be over the officer's quarters.
The fore skylight would be over the galley.
Also note the davits on the port side.
Photograph by B.J. Woods
from The Association of Dunkirk Little Ships.
Used by permission.

If you know of other surviving Motor Launches let me know!