Given that you need the money in 2 months, the easiest option is an on-demand deposit account which will pay around 0.1% interest. This will amount to about € 40 after DIRT so I'm not sure that it's worth the hassle of opening an account :-(
In that case, your priority should simply be the return of your capital - not the return on your capital.
That deposit would be considered a "temporary high balance" and would be fully covered by the relevant deposit guarantee scheme so there is no need to split it up across financial institutions.
There is maximum holding limit of €250,000 (or €500,000 if a joint holding by two individuals) of Prize Bonds newly registered in your name after 1 November 2015.