✔ 最佳答案
Parties tend not to give a comprehensive list of their policies except at election time. They just tend to announce them as and when, so no wonder you can't find anything on the party's web site. I couldn't find anything like that either.
The nearest you will get to it is the 2015 general election manifesto
http://www.labour.org.uk/page/-/BritainCanBeBetter-TheLabourPartyManifesto2015.pdf The manifesto is "this is what we promise to do if you elect us" and all the parties produce one when there's an election soon.
So when it's coming up to an election, look no further - if you want the real deal and not what the news says the parties are saying, read the manifesto!