Immigrationboards.com

I am Swiss, lived here since 1999 first as a student and then after the bilateral agreements between Switzerland and the EU working here. I applied for my PR card in 2014 after the Swiss voted to curb immigration and endager the bilaterals.

I have since moved house twice, both times keeping HMRC and the home office informed via online forms although I could not find any information on address changes for PR cards.

While HMRC always acknowledged this I never heard a peep back from the HO.

My passport runs out next year and due to the EU referendum and the Swiss messing it up with the EU I'm now registered for the relevant tests required for citizenship, hoping I'll have a British passport before May 2017 when my Swiss one runs out making it easier to renew the Swiss one during a visit without worrying about not getting it back in time.

I am worrying about whether the home office will accept my PR card though since it was obtained two addresses ago - does anyone have experience with this?

Not an issue. You are under no obligation to update your address with the HO.
The only thing you will need to prove is that you did not leave the UK for 2 continuous years after obtaining PR. This can be done by submitting bank statements, tenancy agreements or utility bills along with the other documents required for your citizenship application.

Thanks, that should be easy enough and far less material to send in than for the original application for PR!