British Cruiser Tech Tree first look:

Tier 1 – Black Swan

Tier 2 – Weymouth

Tier 3 – Caledon

Tier 4 – Danae

 

Tier 5 – Emerald

Tier 6 – Leander

Tier 7 – Fiji

Tier 8 – Edinburgh

 

Tier 9 – Neptune

 

Tier 10 – Minotaur

 

My source: A thread from on the WoWS official forum, not an official release from WG, so things could change.