Claiming your pension could be fun though, Mikey.
As required, I logged in via my Government Gateway account to check what I'd get. No problems.
Then I tried to log in to actually claim my State Pension. However I kept getting an error message.
When (after listening to the same 10 seconds of Haydn for ages) I finally got through to the help desk, the guy told me "Oh, that will probably be because you've got an HMRC Government Gateway account. It's meant to be the same as a DWP one but it isn't. So you need to register for a new Government Gateway account. However you can't do that from the Government Gateway page because that will just give you another HMRC account. What you have to do is to tell our computer system that you've got an account already and start the claim process. Then, when you get to question 3, say that you've not got an account after all. That will then give you the correct link to apply for a DWP account".
Easy peasy, eh?