"Unless you are unable to work through injury or disability, you will only received jobseeker's allowance for a limited period. It's bugger all, and then it stops. There's no such thing as the dole any more. Amazing the Tories - they so hated the phrase 'coal not dole' that they did away with both of 'em!"

If you are unable to work through illness or injury, you don't get JSA, you get incapacity benefit.

Contribution based JSA is time limited to (I think) 6 months, but income based JSA is not time limited.