You can apply for Rent Supplement if you're working less than 30 hrs per week, and in receipt of whatever Jobseeker's payment you're entitled to.
Entitlement to Rent Supplement will be means-tested, both your wages and your Jobseeker's payment will be taken into account. There is also a maximum rent limit which will apply, it varies from county to county - if your rent exceeds the maximum, you may not be entitled to anything (though as you've been working, you may be granted a period of grace to find cheaper accommodation).