Acknowledgment letter
Thank you for your [email/letter] received by [TfL/London Underground] on
[date of receipt]. You have asked for information about [summary of request].
We will deal with your request as soon as possible and in any case provide
you with a response by [insert deadline].
In the meantime, if you have any queries or would like to discuss your
request, please do not hesitate to contact me [insert contact details].