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FOI request detail

Mice colour

Request ID: FOI-3276-2425
Date published: 28 January 2025

You asked

Hello. I’m sorry to bother you for this question but I am not native to the area. I was wondering if there is information in regard to the color of the mice. Is it simply genetic markings or are they that dark due to the conditions/being dirty. If so, what in the underground system is causing it to keep them this dark? Thank you for your time. I promise this is a legitimate question.

We answered

TfL Ref: 3276-2425

 

Thank you for your request received by Transport for London (TfL) on 9 January 2025 asking for information about mice on our network.

 

Your request has been considered in accordance with the requirements of the Environmental Information Regulations (EIR) and our information access policy.

 

I can confirm that we hold the information you require. You specifically asked: I was wondering if there is information in regard to the color of the mice. Is it simply genetic markings or are they that dark due to the conditions/being dirty. If so, what in the underground system is causing it to keep them this dark? 

 

The typical found across our network is ‘house mouse (mus domesticus)’ which is dark anyway and so the colour is not a direct result of the environment that they live in.

 

If this is not the information you are looking for, or if you are unable to access it for any reason, please do not hesitate to contact me.

 

Please see the attached information sheet for details of your right to appeal as well as information on copyright and what to do if you would like to re-use any of the information we have disclosed. 

 

Yours sincerely

 

 

Sara Thomas

FOI Case Management Team

General Counsel

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