Gatwick to Heathrow.

[corbennic]

Thanks all. Will try not to worry about it too much, after all it’s at the end of the holiday so I won’t be missing anything if we do miss the flight!

[fredflintstone]

As said Friday mornings are the quietest day on the M25 (but not Fri afternoons - they are the busiest).
I do not believe you will have an issue. Of all the years I have been going from LGW to Florida I would always have made a flight at LHR after 11, as I go past there on my way home.
It always looks worse when I drive the other way in the morning, when I have been working by Gatwick, but whenever I drive that way it always seems to move and doesn't take as long.
It's also amazing how quickly the M25 becomes a normal 70 mile moterway after 9.00