I agree with your post trisher
Widowed Parent’s Allowance (“WPA”) is a contributory non-means-tested, social security benefit payable to men and women with dependent children, who were widowed before March 2017. The widowed parent’s entitlement depends upon the contribution record of the deceased partner. Under the relevant law (“s39A”) the widowed parent can only claim the allowance if he or she was married to or the civil partner of the deceased
The issue before the court was whether this requirement was an unjustifiable discrimination against the survivor and/or the children on the basis of their marital or birth status, contrary to Article 14 of the Convention on Human Rights together with the right to respect for family life under Article 8, or the protection of property rights in Article 1 of the First Protocol ECHR.
ukhumanrightsblog.com/2018/08/31/bereaved-mother-entitled-to-widow-allowance-supreme-court/
what would happen if a man lived with a woman, had two children, moved on and repeated that and then died - should both women’s children have the right to the benefit? If not, why not- the relationship of the man to the children is the same and the children’s needs for financial support is the same.
Interesting point - as a couple could divorce, the man then has children with a second wife, then dies. If the man was supporting the children from his first marriage what happens?