Under the authority of Army Council Instruction 1298 of 1916 (29 June 1916), 41 new howitzer batteries were raised. A later instruction confirmed the numbers of these new batteries. This page gives details.
Batteries of the regular army (numbered 500 to 528)
3 batteries were raised by 1A Reserve Brigade at Newcastle on Tyne
3 batteries were raised by 1B Reserve Brigade at Forest Row
4 batteries were raised by 2A Reserve Brigade at Preston
2 batteries were raised by 2B Reserve Brigade at Brighton
1 battery was raised by 2C Reserve Brigade at Leeds
4 batteries were raised by 3A Reserve Brigade at Hilsea
2 batteries were raised by 3C Reserve Brigade at Swanage
2 batteries were raised by 4B Reserve Brigade at Corton (Wiltshire)
1 battery was raised by 4C Reserve Brigade at Weedon
1 battery was raised by 5A Reserve Brigade at Athlone
2 batteries were raised by 5B Reserve Brigade at Ballincollig
2 batteries were raised by 6A Reserve Brigade at Glasgow
1 battery was raised by 6B Reserve Brigade at Edinburgh
1 battery was raised by 6C Reserve Brigade at Redford (Edinburgh)
Batteries of the Territorial Force
2 batteries were raised by Number 2 TF Artillery Training School at Bettisfield Park: numbered 529 and 530
2 batteries were raised by Number 3 TF Artillery Training School at Bulford: numbered 531 and 532
2 batteries were raised by Number 4 TF Artillery Training School at High Wycombe: numbered 533 and 534
2 batteries were raised by Number 5 TF Artillery Training School at Richmond (Yorkshire): numbered 535 and 536
4 batteries were raised by Number 7 TF Artillery Training School at Winchester: numbered 537, 538, 539 and 540