Contact

The form is the quick route for ordinary feedback and opens in a new tab. For anything that needs a reply, or does not fit the form's questions, use the email address.

What gets a reply

• Bug reports — with the page, the browser, and what happened.
• Mistakes in the data — a wrong reading, a wrong translation. Name the lesson so it can be found.
• Suggestions — including apps for the empty slot.

Rights holders

If you are a rights holder or an authorised representative and believe content here should be corrected, attributed differently, restricted or removed, write to the address above.

Please include enough information to identify the material and the basis of the request. Reasonable requests are reviewed and acted on, which may mean correcting attribution, disabling access or removing the material.