This in from Wightlink, in their own words, Ed
Services will be affected by the Great South Run in Portsmouth on Sunday 28 October. Between 0930 & 1230, roads will be closed (subject to Police Control) and there will be changes to the timetable.
Passengers travelling on the 1000 sailing from Gunwharf MUST arrive at the terminal no later than 0915.
Passengers will need to allow extra time for their journeys and are advised to call 0871 376 1000 before travelling for the latest update
Please remember British Summer Time ends on this day and all times shown are Greenwich Mean Time (GMT).
Sailings will operate as follows
From Portsmouth (Gunwharf Road); 0100 (GMT); 0300; 0500; 0600; 0700; 0750; 0900; 1000; 1230; 1300, thereafter normal service
From Fishbourne; 0200 (GMT); 0400; 0600; 0700; 0800; 0850, 1000*; 1100*; 1200*; 1330; 1400, thereafter normal service
Other routes will not be affected by these issues.
*The 1000; 1100 & 1200 sailing from Fishbourne will arrive at Portsmouth International Port, no foot passengers will be carried on this service.