Tylden proceeded to the Crimea with the army, and took part in the Battle of the Alma on 20 September 1854. Lord Raglan in his despatch referred to him as being ‘always at hand to carry out any service I might direct him to undertake.’ He was taken ill with virulent cholera on the night of 21 September, and died on the evening of the 22nd. He was buried in a vineyard before the army marched on the morning of the 23rd. In the orders issued on the occasion it was stated that ‘no officer was ever more regretted, and deservedly so.’ It was announced in the "London Gazette" of 5 July 1855 that, had Tylden survived, he would have been made a knight commander of the Bath, and in the "Gazette" of 8 September 1856 his widow was authorised to bear the same style as if her husband had been duly invested with the insignia.