If you are on jobseekers then you are entitled to the reduced £360 fee rather than the full £510 fee. You need to complete the following form and take it with you to the court when you file for BR:
You will still need to complete the 6.27 and 6.28 forms (http://www.insolvency.gov.uk/forms/englandwalesforms.htm) to petition for BR and if you have any problems with the forms and aren't sure what information needs to go in which section let us know and we can help.