Britain is increasing welfare payments for spouses in certain overseas polygamous marriages, even though entering into a polygamous marriage in the UK is illegal. New figures published by the Department for Work and Pensions (DWP) show that from April 2026, second, third, and fourth spouses in qualifying households can receive £125.25 per week in Pension Credit or Housing Benefit—up 4.8% from £119.50 last year. The payments apply only to marriag…