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Hi thank you for your enquiry and patience
What status does your father have? Is he on Tier 2 or another type of visa?
You need to answer my question above because it depends on what permit your father has.
And your dependancy was always with him holding ILR or he had Tier 2 visa?
As long as your ILR is not following dependancy on Tier 2 visa there is no requirement for a minimum balance in the bank, however you have to ensure you have enough money for your application fees and that if you are above 18 years of age you meet your english language requirements and have passed your life in the UK test and also that you have not been absent for over the 180 days allowed in each 12 consecutive months.
The application fees are £2,389 per application and £19.20 for the Biometric Residence Permit.
I hope that is useful to you and I would be grateful for you rating at your earliest convenience. All the best
You are welcome. And all the best to you both. If it is not too much trouble may you kindly rate my assistance by clicking on the row of stars at the top for JA to acknowledge your feedback and my input.