The head teacher of Trinity School in Carlisle, Alan Mottershead, said Josh Thomas had made a good, warm impression at the school.
Mr Mottershead said:
"He was a good lad and got on well with everybody."
Josh moved to Cumbria from South Wales in September 2010 when he was 15 and stayed for one year to take his GCSEs.
Mr Mottershead said Josh had always said that he wanted to join the Army.
More top news
Some good sunny spells at first, especially in the west. Much brighter in the east than of late, just some patchy cloud around
This weekend we swap one area of high pressure for another, with some fronts inbetween. An improving weather situation...
Alex Salmond has announced his intention to end a 24-year career at the forefront of Scottish politics. Here is a brief look at his career.