I have an offset mortgage account which does better than any bank account possibly could on account of me being a higher tax rate payer.
But failing that, yes, you could set up the account, and if there are any others, set them all up too. Then it's simply a case of hopping the money between them. So set up a standing order for the £500 into the account, then the next day make it move to another account, and so on, until it lands in whatever account you need it to stay in, and you have met the criteria for all accounts. I would have done that had I not got my offset account, where I simply don't pay the mortgage interest on the money in the account. It works out as the equivalent of getting 7.5% on my money, so can't really be beaten.