A minor disclaimer: This is not valid for the United states or Ireland. On ireland for obvious reasons, and in the US because the USA has many strong christian denominations apart from the Anglican church, I'm not saying that the catholic church and the other non aglican protestant denominations (like the methodists and calvinists) are not important on the other members of the anglosphere, but for this scenario the main religious figure must be the anglican church.
The challenge is basically to keep the anglican church strong and present on the political scenario and every day life on the anglosphere, especially on the United Kingdom, the PoD is january 1st of 1900.