Copy from Advice Guide:
Contribution-based jobseeker?s allowance (JSA)
If you were dismissed for misconduct, contribution-based JSA may not be paid for up to 26 weeks. Misconduct means that, in your employer?s opinion, you did something wrong. You can appeal against the 26 week sanction.
Contribution-based JSA may not be paid for a week which is treated as covered by a payment in lieu of notice.
Compensation for unfair dismissal may cover a period in which you have been getting contribution-based JSA. If this happens, the JSA may have to be paid back out of the compensation money. If compensation has already been paid when you claim JSA, it may prevent you receiving it for a period.
Redundancy pay does not affect contribution-based JSA. However, if you get redundancy pay in excess of the statutory amount, you may not get contribution-based JSA for the period treated as covered by the extra payment. If you received holiday pay as part of your final wage, you cannot get contribution-based JSA for up to four weeks after your job ends.
For more information about your rights when you have been dismissed from your job, see Dismissal.
The rules about contribution-based jobseeker?s allowance and payments at the end of a job are complicated. You should consult an experienced adviser, for example, a Citizens Advice Bureau. To search for details of your nearest CAB, including those that can give advice by email, click on nearest CAB.