Endowment...stick or twist???

money_muppet_2

Help !!
I have an endowment mortgage for £50,000
£40,000 of this started in October 1988 and matures in October 2013
The remaining £10,000 started in May 1991 and matures in May 2013.

I pay a total of £ 70 per month to cover both endowments and £220 per month with the Aliance and Leicester at 3.54% to cover the interest on the original loan.

The surrender value of my first endowment to the provider is £20,323
It has a guarenteed minimum value at the end of term of £27,505

The surrender value of the second endowment is £4,940
This has a guaranteed minimum value at the end of term of £6,357

So here is the question...
Do I stick with the existing endowment mortgage and stand a potential £16,138 at the end.. or worse?
Do I cash in the endowments now and take it off the total loan leaving around £24737 to pay off by some other method??
Any and all advice will be appreciated as i really am a money muppet !!

EdInvestor

Post more info

Provider(s)
Monthly premiums
Maturity projections

money_muppet_2

Alliance and Leicester provide the mortgage which from March will be £130.63 for the £40,000 and £29.61 for the £10,000 mortgages.
The low cost endowments were provided by the Police mutual assurance and cost £53.13 and £17.25 respectively.

The 40k endowment matures 17th Oct 2013 and guarantees £27,505.14 at maturity with projections of
£32,000 @ 4%
£35,400 @ 6%
£38,800 @8%

The 10K endowment matures 6th May 2013 and guarantees £6,357.57 on maturity with projections of
£8070 @ 4%
£8920 @ 6%
£9770 @ 8%

Thanks again!