Please check your local planning portal and search current applications for terms such as monopole, mast, antenna.
See rfinfo.co.uk/masts for the most up-to-date guidance on how to object to mast planning applications.
If you are objecting several masts, you may find it easier and cheaper to create a simple Word doc flyer (A5) or poster (A4) using this template and print yourself.
This post may also be useful.
This article includes useful studies to cite: Epidemiological Research on Cell Towers
N.B. The Bristol campaign group is currently objecting to a vast number of masts and creating templates to assist in that. If you would like to contribute to /benefit from that process, please see the Masts section on the Bristol Campaign local page stop5g.co.uk/bristol.
You’re welcome to download and adapt their information page templates: