Neither of those nations are in the EU, Gromit (though I imagine their applications will be examined favourably should they choose to join). However, if you examine the leaderboard you will find that the three (out of 27) EU nations that are mentioned account for over 1,500 prisoners – far in excess of those from Jamaica or Nigeria and almost as many as those two combined.
In fact, at the end of June 2014 (the latest comprehensive figures I can find), the number of foreign national prisoners was 10,834 (12.7% of the total prison population). Those from EU nations numbered 4,252 (near enough 40% of the foreign national total).
But none of that really matters because, as I’m sure you realise, that is not the point AOG is making. It is obviously felt desirable by the UK government that criminal checks should be made on those wanting to enter the country. Yet we are prevented from doing this for potentially 500m people living in the rest of the EU who are afforded access here. If it’s necessary for people outside the EU to have their records checked why do we accept it as unnecessary for those from within? Especially when people from that area make up 40% of the foreign prison population? I’m sure few people would like to see serious or violent criminals admitted here so why does it matter whether they hail from Lagos or Budapest? Or is our obligation to allow foreign criminals unfettered right of entry another of the great advantages provided by our EU membership?