sf101, although I appreciate you sharing what the financial advisor said, I disagree with it.
Although there is a certain amount of gambling involved, if you go under a bus, your estate gets the lump sum, and you can claim at any time, so you don't risk 'losing' it.
Of course it wouldn't make sense to impoverish yourself today in the hope of a small increase tomorrow, but if you are working, or have other reasons not to need your State Pension immediately, it can make sense to defer for awhile.
I am a bit wary of financial advisors - of course many are sensible and helpful. For historical reasons, we had 2 advice sessions when we retired, and I was able to show them both that they had miscalculated on my pension - so I took my own (and Martin Lewis') advice instead, and have been proved right!