It later moved to Frinton - on - Sea and then Clacton .
7th Provisional Brigade became 226th Mixed Brigade as part of 71st Division , and on 1 January 1917 the 29th Provisional Battalion became the 21st Battalion Sherwood Foresters .
Provisional Battalion later moved to Frinton - on - Sea and then Clacton .
7th Provisional Brigade became 226th Mixed Brigade as part of 71st Division , and on 1 January 1917 the 29th Provisional Battalion became the 21st Battalion Sherwood Foresters .