No wrong door: addressing injustices and achieving better mental healthcare provision for under-18s in acute physical healthcare settings.

The distressing reality that mental healthcare for children and young people in acute trust settings in the UK is woefully underprovided is not news. But with acute trust debts being written off, hospital trusts and commissioners of services have a timely opportunity to address this age- and condition-based discrimination.Delivering a just service for under-18s depends on attitude, resources and adequate knowledge of the tasks involved. This article aims to describe the current landscape, summarise the arguments for better integrating mental healthcare into physical healthcare settings, articulate the tasks involved and the challenges for commissioning and providing, and finally share examples of current service models across the country.Ultimately, commissioning and provider choices will be constrained by resource pressures, but this article aims to underscore why commissioning and providing a portmanteau 'no wrong door' hospital service for children, young people and families is worth the headache of thinking outside old commissioning and provider boxes.