I have received my letters re. Pension Credit and Attendance Allowance increases, but not the one for my basic State Pension. It will arrive in due course, no point in wasting people's time with phoning about it. Some years letters arrive during April, after increases actually start.
I keep a very firm control of my income, so until I get actual notification of the amount I am unable to complete my chart that I have showing how much I receive weekly, monthly, annually.
Micawber-like, provided the income is more than the outgoings then I am happy.