Pension vs ISA vs current income

Triumph13

QrizB said:

£10k per month at age 55 will currently cost £2.9M for single-life RPI annuities, per the HL best buy table.

In practice it'll be less than that as you'll have two SPs and the DB, but you're probably still looking at £2M.

And that's all in today's money.

Good news for OP, you forgot the state pension.
Bad news for OP, you forgot tax - which is going to be a lot as one income is going to be big.  I make it more like £3.7M they need their assets to grow to on your assumptions.  That would need 10% real return for next 10 years.

It would also make much more sense to buy an annuity with a survivor benefit for the partner's annuity as otherwise OP would be in trouble if they didn't die first.