I work in the suburbs of Southampton (I can see and wave to my place of employment when sailing East out of Soton cruise terminal), as do many of my colleagues. M3 and M27 have been really bad recentl;y. Those that have to use either motorway to get into the office in the morning have been having a nightmare recently with journeys taking easily double the normal time. When you then add in the M25 from London (biggest car park in Europe) I would definately want to come down to the city the day before if possible, but no later than 10am same day if not.