which road should I take - the A3 or the M3? We usually drive up to London via the A3 through Guildford, but I have no idea how busy the roads will be at that time in the morning. My flight's not until 1115 but I'm aiming to meet my sister at the airport around 9.30. Does anyone have any idea how busy those roads will be then? (I'm hoping it won't take 3 hours, but you never know ...)
TIA