From next year it will count as part of your estate for the calculation of Inheritance tax .... your wife (and any other beneficiaries only get the full pot tax free if you die before 75 after that they pay income tax on it.
The rules about 25% tax free are not written in stone and may change. Withdrawing it does not reduce your savings (you can invest it elsewhere ) it does however reduce your future liabilities.
Suggest you revisit your advice.
Not quite right, it passes to your spouse free of any tax regardless of the amount, it could be £1Bn and you pay no tax. With respect to inheritance tax for your beneficiaries, unless the assets including your pension exceed £1m or £500k if you aren't married then there is no tax to pay.
Where it gets complicated is if you have assets exceeding £1m as a couple (£500k as a single person). Previously your pension was outside your estate, now it sits with your estate so if you die after 75 anything above £1m is subject to not only 40% IHT but any withdrawals will be charged income tax at the rate of the beneficiary (normally your children). So if they've done alright for themselves it could be effectively another 40 or even 45% on top.
That all said for anyone in that position, it may be time to get some of the money spent or at least gift a chunk to your kids if passing down wealth is important, remembering gifts greater than 7 yrs before death are outside the estate.
Another option is to do gifts out of surplus income, which is simple to do, but you need to keep records and it needs to be regular (e.g. monthly not annually) of a roughly fixed amount and it can't be from capital, so must be income from the investment or from work.
There are ways via trusts where you can stash money to then pass down, if you think giving them it now would result in it being spent on fast cars, coke and brass.
If you do have a valuable estate (in excess of say £2m) you don't need a financial advisor you need a wealth manager, who are specialists in the protection and growth of intergenerational wealth.