We are asking readers to get involved in a project compiling a database of police spying since 1968

Undercover police have spied on more than 1,000 political groups in the UK since 1968, but with no officially published list of the groups the Guardian is now compiling a searchable database.

UK political groups spied on by undercover police – search the list Read more

It is currently a work in progress which will be updated as more information becomes public, and as part of our investigation we are now asking for your help.

Share your stories, experiences and news tips

If you have information you would like to share with our reporters about this undercover policing or have been affected by this story, we would like to hear from you. Your input will help us build a more complete picture of the facts, and with your permission we may contact you to discuss further.

You can get in touch by filling in the encrypted form below. Your responses will only be seen by the Guardian and we will treat them confidentially. If you require an additional level of security you can find more ways to contact the Guardian here.

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