Barack Obama has discussed Iran having a role in helping to stabilise Iraq - so long as it respects all sides. The UK Foreign Secretary William Hague has already spoken about talking to Iran.
But Mr Hague told ITV News today there would be no on-the ground sharing of British counter-terrorist expertise with Iranian officials.
ITV News Political Editor Tom Bradby spoke to Mr Hague:
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The memorial service will be attended by Prince Harry and Meghan Markle.
David Browning admits manslaughter by diminished responsibility but denies murder.