As dzug2 says, the state pension is taxable income, as is your personal pension – so if you have a £100k pension pot, you will have just about taken all the £100k out by the time you reach 62.
Some other things to bear in mind; although the new ‘flat rate’ state pension is of the order of £145/week, you will only get this amount if you have sufficient NI contribution qualifying years (being a house wife does not count). Also if your personal pension was contracted out (of the state scheme), these years will not count – you could find yourself on a state pension of around £110/week.
I would also advise you to check that your pension you expect to receive at age 62 is on track to payout as expected.
I have a personal pension, the terms of which were that it would pay me a full pension at age 60 (without any reduction). Since the company scheme has fallen on hard times, the terms have been unilaterally amended such that I will not receive this pension until I am 65, and taking it early would result in swingeing reductions in the payout amount.