Can Canadian immigration ask for UK access subject request?

[Ispirare]

Can Canadian immigration Ask UK home office for subject access request? What kind of information can they ask the Home office? Thanks

[Frontier Mole]

They can not go through a SAR as that is not an option for a third party.
However if there is an information sharing arrangement between the UK & Canada then if there was a specific reason to do so information could be shared.
Normally this would only be done if there was some cause for concern

[secret.simon]

To the best of my knowledge, the UK Home Office & UKV&I do not share information directly with Citizenship and Immigration Canada (CIC). They can not apply for a SAR in your name, only you can.

But they can require you to apply for a SAR and submit it to them. I know that a British colleague of mine who migrated to Canada had to get his criminal records from ACPO and submit that to the Canadian authorities as a part of his Canadian permanent immigration application.

So, if they need to contact the Home Office, it would be through you.

Be aware that the intelligence services of the five major Anglophone countries (US, UK, Canada, Australia and New Zealand), the so-called Five Eyes, do share intelligence data. So if you are lucky enough to warrant intelligence surveillance, that information will be shared across the intelligence agencies. But that will not be CIC directly asking for your information from the Home Office.