It depends, you need to think how would you or your partner cope if you were to die, so for us if my OH died I would get around about £240,000 plus a bit of money a month (not sure how much) which would cover paying off the mortgage (which is the big thing for most of us) and any big bill, funeral costs and mean i wouldn't have to stress about a job straight away (im a sahm now) but i would need to go back to work.
If i died he would get £150,000, which would pay off the same sort of stuff and mean more of his wage could go on childcare, which he couldn't afford if we will had the mortgage and other bills.
If your both working, with no mortgage and could survive on the one wage then its probably not needed, although you could get a small pay out like £5000 which would pay any big cost on the death of a loved one. that wont cost much, mine costs about £6 per month for a 30 year fixed policy.