Zampolit's events:
Currently used event IDs for Germany are 21001, 21020, and 21100 to 21105 and 21200 to 21205. I suggest 21002 for your event.
Britain: 56001 to 56013, and 56100 to 56102 are in use. 56014 seems reasonable...
For the text, I suggest something like this:
"Our navy has seen an opportunity to slip a force of battlecruisers past the British blockade and shell their coast line. Such a failure by the English fleet to safeguard their people will be a huge embarrassment to them, and is likely to increase popular unrest. However, striking at civilian targets in this way might cause us a few political problems at home."
The action name should be "Bombard the English!" (Ships bombard, aircraft bomb. Don't ask me why: that's the English language for you!

)
For the British event:
"Ships of the German navy have slipped past our defences and shelled the coastal towns of Scarborough, Hartlepool and Whitby. 137 people were killed, including women and children. By allowing the German ships to carry out this work of barbarism, the Royal Navy stands openly accused of failing in its duty."
Action name: "This must never happen again!"
In my opinion, the dissent hit is fine but the IC and Infrastructure reductions are much too big. As you see above, the Germans only killed 137 people, and the three towns are basically fishing villages and holiday resorts, not centres of industry
