A 27 ft Whaler aboard HMS Rodney
A 27ft Whaler of HMS Cyclops.
Whalers in a sailing race at Gibraltar, 1938.
Plenty to find, google Montagu Whaler.
(https://en.wikipedia.org/wiki/Montagu_whaler)
https://www.1nelson.ca/uploads/1/4/2/3/14230335/service_whaler_manual.pdf
ON BOARD THE DESTROYER HMS COSSACK DURING TORPEDO AND ANTI-SUBMARINE EXERCISES. 1940. © IWM (A 1589)
HIGH COMMISSIONER FOR NEW ZEALAND VISITS THE TRAINING ESTABLISHMENT HMS ST VINCENT. 15 APRIL 1942 © IWM (A 8275)