Possibly better off to set up a savings plan and pay into that monthly.
For example
http://www.whatprice.co.uk/health/funeral-cost.html suggests £2,750 as the current cost of an average funeral.
Also note from
http://www.legalandgeneral.com/overfifties/funeral-plan/ the following:
"If you stop paying premiums when they are due the plan will be cancelled and you won't get anything back."
So some (perhaps most) funeral plans are only worthwhile as long as you continue to pay the premium every month until your death (or your 90th birthday for the plan above). There is no 'cash-in' value. All the money you pay is gone if you can't keep up the premiums.
If you pay for example £25 per month then it will take just over 9 years to save the money above, and if you are lucky the interest on the savings will at least partly keep up with inflation.
Should you find yourself unable to pay in the future as you get older then at least the payments you have made will still be there and will pay some of the costs.
My very personal view is that funeral plans which require you to pay each month until you die are of doubtful morality if they accrue no cash value. I suspect that they are betting that the old will find themselves unable to pay the premiums when times get tough and thus will have paid out a load of money with no return. As I say, just my personal biased view.
So - if you think you can last a couple of years but won't make it to 5 then an insurance plan may give you the best result.
If you think you are good for 10 years plus then a savings account may make more sense.
If you last for 15 years you can have one hell of a send off 8)
Cheers
LGC