The soldier in question is Private Jesse Hiscock, 85505, who signed up in 1906, went AWOL after hitting a sergeant and then seems to have rejoined in 1913/14. He was transferred to the reserve in 1918.
His paybook at the time of his transfer shows that he served with the DCLI and with the Devon Regiment.
Can anyone date his uniform in the attached photo?
A photo of him with mates in 1906 is shown in the Document Repository topic area.