What happened
The two-child limit was introduced under May by Chancellor Philip Hammond as part of welfare reform. Its stated rationale was 'fairness' — ensuring that families on benefits make the same financial decisions about family size as those not on benefits. This rationale does not hold up to scrutiny.
People do not have children to increase their benefit income. The child element of Universal Credit (worth roughly £56/week per child) is not a financial incentive for additional children — it is a partial contribution to the actual cost of raising them, which the Joseph Rowntree Foundation estimates at £200/week for a child in the UK.
The policy affects children who are already born. It does not prevent large families — it makes the children in those families poorer. The IFS estimates 1.6 million children are directly affected. The Joseph Rowntree Foundation calculated in 2024 that scrapping the cap would be the single most effective child poverty reduction available to any government, lifting 540,000 children out of poverty.
The rape clause is particularly grotesque. A third child conceived through rape can be exempt — but the mother must fill in a form, provide evidence, and make a formal declaration to a DWP official that she was sexually assaulted. The National Domestic Abuse Helpline, Rape Crisis England and Wales, and Women's Aid all opposed the clause as retraumatising and impractical.