heres the refit info from 1920 - 1939, i'll add in two links
first -
http://www.hmshood.com/history/construct/repair42.htm
that is the refit that was cancelled due to the declorartion of war on germany and some other countries.
second -
http://www.hmshood.com/ship/index.htm
this gives you the statistics for the armorment and related systems such as radar
anti- aircraft
torpedoes
deck guns and more