The UK Foreign Secretary William Hague rejected a claim the government was "softening" its approach to Iran.
Speaking in the parliament, Mr Hague described the UK as "absolutely relentless" in its efforts to defeat terrorism around the world and added: "I can assure you that there is no softening of any of our policies in relation to Iran.
More top news
Sergei Lavrov said he hoped the Trump administration would prove more willing to work with Moscow on Syria than the US under Barack Obama.
The funeral of victims' rights campaigner Jill Saward will be held today at Lichfield Cathedral in Staffordshire.
An 18-year-old man has been arrested on suspicion of murder following the death of a teenage girl in the Dinnington area of Rotherham.