I agree with New Judge. The fact that pensions go up annually is not relevant here (assuming pensions go up more or less in line with prices)- to compare like with like we should just consider everything at present day values.
Two other factors to consider, Griptons, are tax and eligibility to benefits. You may want to time the start date for taking your pension so as to avoid having to pay tax altogether for the first tax year. You can also claim contribution based JSA for the first six months but if you take your pension at the same time you may not get any JSA so I suggest deferring your pension for at least 6 months and claim JSA for this period, bringing in around £1700. this JSA is not means-tested so you would get it even though you'll have savings income.
The big unknown in of course is the age you will live to. If you are going to live to 85 then to maximise lifetime earnings you should defer taking your pension until nearer age 65, but if you expect to live to only 70 then start taking it as soon as possible.
Finally, to minimise tax, consider taking up to 25% of your fund as tax free lump sum. This would reduce your annual pension income of course so get a calculation done and make sure you can get by adequately