What minimum amount do you need for an annuity for a a long period of time or a lifetime when you retire plus a full pension?
There isn’t so much of a minimum amount more along the lines of the more you contribute towards the annuity, the more they will pay you for life.
I think you should seek out someone who can provide you with appropriate advice, pay a fee to them and get some real advice.
Posting questions on here all the time or searching Google isn’t going to do it for you. You just end up constantly searching but never doing.
All the best.