"Cancer treatments are not being trialled in children because of outdated European regulations which are in urgent need of reform, say cancer experts.
They are urging European officials to reform the rules on clinical trials in children now or risk cementing the current outdated approach for years to come.
The experts also insisted it was vital that new reformed rules were applied across Europe so children in the UK do not lose out after leaving the EU.
Otherwise there is a risk that children here could be denied access to European trials and suffer even greater delays in access to the latest cancer treatments.
The Institute of Cancer Research, London, and The Royal Marsden NHS Foundation Trust set out their concerns in their response to a European Commission consultation on the future of the EU Paediatric Regulation."