Joseann
I had a letter showing both when I got to retirement age.
Can I ask what you mean by that please?
Don't worry, I get it. I thought you meant two separate letters to choose!
Sorry, Joseann, I wasn’t ignoring you, I’ve been out all day. 
Yes, just before my 66th birthday I got a letter showing me what my entitlement would have been under the old scheme and what it was under the new scheme, and how these figures were worked out, showing superannuation payments, etc. Then confirming that I would get the higher of the two amounts under some transition agreement. This was based on the new state pension, but wasn’t the full amount, as I’d been opted out for a good few years.