My pension is straight forward. I know what I get and it doesen't really alter..... no problem.
I collect the aunties pension each week (paid into the post office).
Most weeks its exactly the same but every 4 weeks it goes up by 150%

So.......
most weeks its approx £150 then every 4 weeks it is nearly £400..
No use asking the aunty.
I have tried googling it.
This is state pension only.
Thanks.
So, approximately £850/4 weeks? That sounds rather high, based on State pension rates, but, it does depend on her (or possibly her husband's) work record, perhaps, she is in receipt of additional pension, based on Serps type contributions? As far as I know, DHSS (or whatever they are called now) send out a letter annually, detailing any increase in Pension, these should be due round about now, I would guess, perhaps, that will include a breakdown of her pension (ie Basic State Pension, Additional Pension etc).
Alternatively, as others have said, perhaps, there is some form of additional benefit buried in there (eg Attendance Allowance, Mobility Allowance....). AFAIK, if you are in receipt of Mobility Allowance before your 65th birthday, this continues, but, you cannot begin to claim it after your 65th birthday. I say, 65th, that should perhaps be "current state pension age".
At. 95, Auntie must have begun to receive her pension approximately 35 years ago, so, goodness knows what "rules" applied then!