Having been made redundant twice and being in private rental, this is something that I worry about at 3am think about from time to time. We have roughly the equivalent of three months' salary in savings. If my job went tits up the small amount of redundancy I'd get means we could, with some strenuous belt-tightening, eke it out to four, possibly even five months. We are trying to save more but can only afford to put a tiny amount away each month - it will take about 18 months to save another month's salary.
It's certainly better than nothing - and I have been in the position where I had literally no savings or safety net at all - but it's not much either, in today's world of 200+ applications for a single job. AIBU to ask how you'd fare if the plug was pulled on your regular income?