The headteacher of a High Wycombe grammar school has described former student, Shabazz Suleman, as a “very engaging and amiable” pupil who had a good work ethic and was on his way to university.

Roy Page’s comments come after the Royal Grammar School was approached by the authorities following concerns that the 18-year-old had joined ISIS.

Police officers who specialise in combating the growth of terrorism will be visiting the Amersham Road school in the coming weeks to talk with pupils.

Foreign Office officials confirmed they are aware of a British National who was reported missing in Turkey this year and are in contact with the family.

Mr Page said: “During his time at RGS, Shabazz was a very engaging and amiable student who fitted in well, forming good relationships with his peers and staff.

“Shabazz had a good work ethic, and was prepared to play a prominent role in class discussions, even though he gave the impression of being a rather reserved and quiet person.

“He showed real determination to achieve good academic results, working hard to build on his AS grades to achieve a solid set of A levels in History, Economics and Psychology and so gained a place at University.

“Shabazz was a valued, hardworking student who achieved well and respected the school’s academic and pastoral ethos.

“Many boys at RGS undertake voluntary work and in the summer of 2013, Shabazz made a trip to Syria as a member of a convoy that delivered humanitarian aid to the people of Aleppo as part of a Turkish charity.

“A few weeks ago the school was approached by the relevant authorities regarding Shabazz.

“We have fully co-operated in the context of the background above and it was those authorities who approached the local press regarding this matter.

“The school does not have any current information on Shabazz. No school should comment on students once they have left the school. We would always want all members, past and present, of the school community to be safe and well.”

A Foreign Office spokesperson said: “We are aware of a British National reported missing in Turkey in 2014. We are providing consular assistance to the family.”