London to Gleneagles - fly or drive??

[wax lyrical]

...and if drive, what route?

Car: BMW 335i auto convertible, so may depend on the weather!

I'm going up to Gleneagles for a few days next week for a work jolly. Flights are already booked and paid for, but I'm seriously thinking about driving as the opportunity for hoonery must be amazing.

Thanks in advance for all input.

[wax lyrical]

Thanks for all the input, all! Much appreciated.

So on reflection, I think I'm gonna fly.