Britain's response to the massive number of widows after WWI ㄷㄷ

After WWI ended, the massive loss of male lives resulted in an overwhelming number of widows that was impossible to manage. In response, Britain passed the Deceased Brother's Widow's Marriage Act (which was already being practiced openly in society) to make it legal for a widow to marry her late husband's brother. It had been illegal until then.
In truth, the reason this law was created was not, of course, to encourage widows to marry their brothers-in-law. Such marriages were already incredibly common even without a law. The problem was that if the brother of the late husband—who had remarried the widow—also passed away, pensions were being denied on the grounds that the marriage was illegal and therefore void. This law was enacted to address that specific issue.