[Jumping]

From a quick whois on that IP it seems it belongs to Virgin, is it your IP address by any chance?

wireshark is a very powerful tool but not the easiest to work with and not sure if its the best starting point for your problem.

When your connection drop out is your router still connected? Like whats the lights on your modem/router show. Can you login to and check logs and status from the modem/router and paste that here.