Hi there,
No i didnt send any bank statements. I cant remember if they asked for evidence though if you have heaps of assets and other income.
At the end it says that you can add information to support your claim- and I did this explaining that I couldnt afford this surgery any other way, cant get credit cards, work casually so can lose income at any time, etc.
Just read the forms as much as you can and make sure you include everything that you can to support your application. Good luck!