Allocator, when I track an aircraft live, for example, going north towards the UK, I'll normally lose it (because of terrain) around the Loire valley - Angers, Tours area (dependent on it's Flight Level). When it reappears as a network flight (if it ever does) it's normally approaching the Isle of Wight, so I suppose that's getting on for 200 miles. The reverse is true for southbounds. There is usually other networked traffic present in the area at the time, and I would expect to see my target aircraft much earlier
Blackthorn, it may well be things can be improved by virtue of temporarily switching off local and switching it back on again, but not always. This is the subject of many postings and a long-awaited fix!
DC