RACHEL SAVAGE and HUGO GREENHALGH A British court ruled on Tuesday that under-16s are unlikely to be able to give informed consent to take puberty-blocking drugs in a landmark trial that has fueled global debate about the age at which a child can choose to transition gender. The London-based NHS trust which runs England's only youth gender identity clinic halted new patient referrals for the drugs after the High Court judgment and vowed to appeal - setting the stage for a Supreme Court showdown. Presiding judge Dame Victoria Sharp said it was "highly unlikely" that a child of 13 or…