You are using an out of date browser. It may not display this or other websites correctly. You should upgrade or use an alternative browser.
alternatehistory.com
There were attempts at creating a French-style Popular Front in the UK, read https://en.wikipedia.org/wiki/Popular_Front_(UK). What if one had been formed and won a general election? Would an UK ruled by such a Popular Front intervene in the Spanish Civil War or, at least, let France intervene?