Hi Ian
Sorry I didn't put these up for you yesterday but a rather nasty cold really knocked me for six!
I'll see if I can find any more for you, all the above are of HMS Rupert with the gun turret pictures are from HMS Hotspur, Rupert's sister ship. The books I found these in are
British Warships 1860-1906 A Photographic Record by Nicholas Dingle
The Black Battlefleet by Admiral G A Ballard
A good website for Royal Navy Armoured Rams is
http://www.cityofart.net/bship/hms_rams.htmlHope you find this helpful, to answer your question, I have a copy of Armed With Stings, and I thoroughly agree with you, a brilliant read into these unknown gunboats. There are some more books about the insect class,
Gunboats of the Royal Navy by Paul J Kemp
Gunboats on the Great River by Gregory Haines
The Shallow End Of War by Conrad Cato
You can see my build of Gnat in the Warships section of the forum, as she could have appeared in June 1941- lots of guns, camo, and history!