Sealand is a structure within Britain's territorial waters (since they were expanded in 1987)... From what legal analysis I've seen, a structure just wouldn't ever be considered as a 'nation' in any sense, and if anything happened there that the UK was really concerned about they would remove the occupants anyway... So unless they had a navy that could go up against the UK's...
They'd need satellite internet anyway to get connectivity that didn't go through the UK so not going to be great latency.
They'd need satellite internet anyway to get connectivity that didn't go through the UK so not going to be great latency.