First, thanks to everyone.
@Bezo: If you want me to go megalomaniac and be confined to an asylum, so I don't have to work and can draw all day, just go on like that...
@smurf: Thanks for the link, hadn't known that one. But if I bought a book for 40+ euros every time I needed some details of a single ship class, i'd have to file for bankruptcy soon...
@mortarigus: Thanks for checking. Unfortunately, some of the info is contrary to Conway, Breyer AND Wikipedia (nobody else mentions 76mm HA guns, much less three of them, or the removal of the 102mm from the aft superstructure). Don't know how old that book is (Conway and Breyer ARE old, maybe your source is better - who knows).
So I went from available evidence of which I was reasonable sure for the Jutland fit. I found a picture with HMS Tiger's fits in each year of the Great War, which indicates the masts of British capital ships were shortened in 1915 already. The torpedo nets were gone too by that time, according to a photograph of HMS Lion taken immediately after the battle of Jutland. Two 102mm HA guns were mounted on the quarterdeck in 1915 or 1916, so probably before Jutland too. The searchlight arrangement however seemed to have been unchanged, also according to pictures of Lion and Queen Mary, and the 102mm in the hull abreast the forward turrets were also still there (on this all sources agree). This gives the following appearances for the three survivors of the class on June 1st, 1916:
HMS King George V