No, Marcel Berlins. A thousand times, no.
There could not be a clearer example of why no ruling of, among other things, the ECHR should have any effect in this country unless or until confirmed by resolution of the House of Commons.
How many European countries do let prisoners vote? Very, very few, I'd bet.
Anyway, if you want votes for prisoners, then vote Lib Dem. If you don't, then don't.