SNN An124s
There is just one An225 Miyra in commerical use, operated by Antonov Design Bureau. Volga Dnepr have an EU Mx base in SNN thats why you see them there.
Otherwise SNN often used as a tech stop for heavy USA/Canada flights with these beasts ex-Central Europe.
The other people, POLET also pass thru from time to time enroute to North America.