So I have no idea if this is borderline ASB or not, but what if the potato blight of mid-19c Ireland crosses the Irish Sea and spreads throughout Britain.
Obviously, this might not have such an impact in England or Scotland as it did in Ireland, since the poor are perhaps not so dependent on the potato harvest as in Ireland. Would the government stand? Could it/would it do something that it didn't OTL? From what I'm aware several influential people were willing to help, but specified CoE/non-Catholics only, would this discrimination continue in England (most likely, I would guess).
*My apologies if I've made mistakes. 19th century British history is not my usual area of expertise.