Original: The Church of Ireland was disestablished in 1869 (effective 1871) and the Church of England was disestablished in Wales in 1920, the Church in Wales becoming separated from the Church of England in the process - it had formerly effectively been the Church of England and Wales.
Simplified: The Church in Wales was split from the Church of England in 1920 by Welsh Church Act 1914; at the same time becoming disestablished.