A death grant is payable, as well as a spouse's pension and children's pension, where appropriate.
From your rights as an active, deferred and pensioner member, only one (the highest) death grant right is paid. You do not receive a separate death grant payment from each type of membership.
If you fail to nominate someone for any lump sum death benefit, it might take longer for the payment to be made. The person receiving the lump sum might also have to pay inheritance tax if they've not been nominated using the form.