No one has mentioned the Attempts Act which kinda changes things or not
rising to the challenge of not finding att. manslaughter in a british court - it comes up in BAILLI
z v Finland
https://www.bailii.org/cgi-bin/format.cgi?doc=/eu/cases/ECHR/1997/10.html&query=(%22attempted+manslaughter%22)#disp1
and a whole load of other cases
BUT 1. stinky europeans
and 2. in these heady days of Hard Brexit whether you think such cases are part of British Law or just advisory - or nothing
3. whether manslaughter in this translation exactly matches the european counterpart. Thpanith homocidio doloso cd be quite different from manslaughter.
[mein gott it sounds as tho I am an underemployed lawyer itching for a fee innit? oops doesnt it my lord, I mean ]
R v Creamer doesnt come up in BAILII