This is regarding the BA offer for banking with Natwest.

Any experince with this. It says that opening an account with GBP 25,000 would get you upto 25,000 miles.

Q) Can I open an account and get the Miles and then close it a month later?

Q) Is there any penalty for closing the account? Any hidden fees?

25,000 are not bad if it takes filling up a form and shift funds temporarly to another bank.