From the IAA's own website:-
Ryanair fuel policy fully complies with EASA European Regulations and is regularly reviewed by the IAA. EU regulations require that an aircraft has sufficient fuel:
to fly to its destination plus a 5% contingency plus;
complete an approach and go around at the destination airport plus;
to divert to the nominated alternative airport;
to hold at the alternative airport for 30 minutes;
to make an approach and landing at the alternative airport;
to have 30 minutes fuel remaining on landing.
Er, are we sure about this?! Hold for 30mins after a diversion and still land with final reserve??
Something doesn't quite add up here!