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
Four men have pleaded guilty to producing £152,000 worth of cannabis, in a bungalow at Silloth which they 'converted into a drug factory'.
Young people across Cumbria are being urged to come forward to get support setting up or developing a farming related business.
A 3.2% fall in house prices across D&G has highlighted economic challenges facing the region according the South Scotland MSP Colin Smyth.