Schools are required to meet strict safeguarding obligations and any member looking to help support a lesson on tax should confirm with the school what their precise requirements are.

In general, as long as a volunteer for a one-off event is never left unsupervised with the children no DBS (in England and Wales), Disclosure Scotland (in Scotland) or AccessNI (in Northern Ireland) checks are required, but it is essential to confirm the school's approach.

Other practical matters to consider before a school visit might include:

• Confirming it is practically possible to show any slides or videos to the class.  In addition to having the relevant equipment, confirm that YouTube is accessible from behind any firewall if you wish to share videos.
• If you are planning to bring in any food, check whether there are any allergies or health conditions that should be considered.