German Pension application from UK

I have received a letter from the German Pension provider that asks to contact the UK pension provider for the respective application forms under European law. The UK authority would then submit the pension request to Germany. My questions: Who and how to contact in the UK? What forms do I need to submit?

Hi,
This forum is for general queries only and is intended to help you self-serve.
We are unable to provide specific advice tailored to individual circumstances:
Contact the Future Pension Centre
Thank you.

You should call DWP International Pension Centre and explain that you wish to claim your German state pension. They will send you a form CFN901 which asks for things like your German pension reference number. DWP will send that information, together with your UK NI record to the DRV Bund Berlin, who will then contact you directly for any additional information and/or to inform you of your pension award.