See Child trust Fund (CTF) bulletins published by HM Revenue and Customs.
This document collection contains CTF bulletins for fund providers and local authorities.
The National Archives website has details of earlier CTF bulletins for:
1 January 2014
9 July 2015
+ full page history
HM Revenue & Customs
Tax agent and adviser guidance
Tax on savings and investments
Don’t include personal or financial information like your National Insurance number or credit card details.