Might he be related to Thomas Bertram Anderson Lee also from Allen's Hill (see separate entry on the database).
Teesdale Mercury 1 September 1915 - Page 5: Column 3
Private Isaac Lee, well-known Teesdale angler, wounded in the hand whilst on active service in the Dardanelles.
Teesdale Mercury 29th September 1915 - Page 5: Column 4
Private Isaac Lee, of Holwick , arrived on Saturday from hospital wearing his blue hospital uniform, having been injured in the hand at the Dardanelles.