You can have a hundred accounts if you so wish, as long as you do not use them for illegal activities like money laundering. I think spreading the money over several banks is a good idea, even if the government guarantee is unlimited. The unlimited guarantee will have to end some time, and then you will want to keep the amount in each institution below the guaranteed amount.
You should look at moving the money to wherever the highest amount of interest is paid, and revist this on a monthly basis for demand accounts, and upon maturaity for term accounts.