By the time you have faffed with RFD fees etc etc and travelling to and fro etc you may as well drive.
Driving is far more expensive in costs, time and risk of serious hassle.
It costs me 3 to 4 fill ups to get from Edinburgh to London and back in a Landrover, at £100 a time or more, so £350 straight off in fuel alone.
Then add on 1000 miles of wear + depreciation.
Then add a day of time there and day back (with miles of 50 mph zones on motorways, the time of getting there and back in a day are long gone even if one would be reckless by taking all the hard sweets in the world to chew to stop you falling asleep (as adults cannot nod off when eating) along with a tub of caffeine tablets.
Because it is two days, add an overnight hotel at £100+ and the cost of eating out.
Landrovers are not the most reliable cars either so the vehicle itself can spring another surprise that you would be much less likely to have in any other vehicle. Of course, you may have a Toyota.
On top of all of that is the camera risk: forget to put on the cruise control for a few miles and one sees a couple of flashes in the rear mirror, especially when the speeds keep changing up and down. Camera speed limits in S. England seem to be MUCH stricter than those in Scotland. Those flashes are expensive and hit your FAC at renewal time. Navigators, even Wayz, do NOT include all permanent cameras even on the M6 and A1/M1 let alone temporary ones or vans parked on bridges with zoom lenses and lasers.
Overall budget on £550+ for driving from Edinburgh to London if your time is free, and multiples of that if it is not. One can fly to the USA and back for that cost!
Compare that with an email or call to the team at Edinburgh Rifles who for £30 handle the whole lot, including the courier, without stacking sender and receiver RFD charges: it is a great service, much appreciated and avoids you needing to post your FAC to anyone. Also had great experience with the chaps at John Dickson in Dunkeld.
Or, you could view it as a family trip if your folk live abroad (translation for non-Scots, a tongue in cheek phrase used even by staunch unionists that means "to or via England"), cultural visit to the Hull Opera on the way, a shoot to attend where you need to carry back things that can bleed, or a work commitment you can intertwine involving a load too heavy to fly with. Those are the only reasons I would have for driving abroad now.