The Charity Commission has updated: 
The essential trustee: what you need to know, what you need to do (CC3)
What’s required of a charity trustee, including your responsibilities to your charity. This publication has been updated in line with recently published guidance on automatic disqualification and safeguarding.
Charity trustee: what’s involved (CC3a)
Find out what being a charity trustee involves, if you can claim expenses and where to get help and advice. This publication has been updated in line with recently published guidance on automatic disqualification and safeguarding.
Finding new trustees (CC30)
The recruitment, appointment and induction process for new charity trustees and how to set a framework for recruitment. This publication has been updated in line with recently published guidance on automatic disqualification and safeguarding.