Please forgive my horrible lack of tact.
If your late dh was paying a stamp, and was under 60, you are entitled to a £2000 one off grant which is non means tested. The form that you need is the BB1 04/07. This is collected from the local Jobcentre, you will need to show them the death certificate.
YOu may also be entitled to means tested assistance for the funeral itself.
THis form is the one that also registers you to the widowed parents allowance
If I can be of any help to you with wading through the ghastly paperwork, please let me know