Having gone through roughly this scenario (ie retired at 60, when state pension age was 65), I would say...
1. Will your "works pension" pay out in full at age 60, or, will you have to take a reduction by retiring early? In my case, the "hit" on my pension was 50% for taking if five years early.
2. Having established 1 above, work out what your annual retirement income will be for the period 60-67, that is, works pension, plus any investment income you may have. Consider waving the lump sum, unless you really need it, and, it will increase your pension.
3. Spend some time working out your outgoings, be realistic, no point having to live on stale bread, on the other hand, there will be savings, ie no travel costs to work, no office collections.... etc. We also went down to one car. In 12 years, we have only once encountered a "car conflict".
4. Compare outgoings with income. Provided Income is equal or greater than outgoings, you have a chance
5. Maintain control, as income falls, it is more necessary than ever to be in control of what you have. This does not mean being scrooge, it just means having a plan and monitoring it, making adjustments if necessary.
In my case, household income fell to 40% of "in work income", but, we have managed perfectly well. I can honestly say there is nothing we have wanted to do, which we have not been able to do for money reasons. The biggest difference I find is, if a fairly large, unexpected expenditure "occurs", then, I have to plan more carefully how to handle it.
Good luck. Retirement is fantastic!