Di i need to fill TIER1 form necessarily?. I am covered by HSMP Jud. Review. I live in Pakistan.?

HSMP- Judicial Review. I landed Heathrow on 29 july 2006 and left UK after Changes were introduced on 04/02/2007. As per guidance and policy of Border Agency I think i have to apply on Tier-1 form. I worked in Uk and Paid Tax. Do I need to show maintenance funds equivalent to the amount required to apply in Tier -! , i.e. 2800 pounds for at least three months in my possession/ account. I do have the sufficient funds but I can not prove that these funds have been in my account for atleast past 3 months. What fee i would have to pay for FLR.