Third party vs fully comp

[hawkida]

So Greg is likely to share driving with me when we go to Wales soon. He is covered to drive my car 3rd party. My car, according to http://www.webuyanycar.com, is worth a grand total of fifty quid (the tyres cost me four times that! And it doubles in value when I put petrol in it!).

Given these facts, is it worth insuring Greg to drive my car fully comp? Not sure if this is a factor, but I have RAC roadside recovery.

Comments

[del-c.livejournal.com]

Ask them to insure you fully comp for free, that is, no more than third party costs you anyway. They often agree if the car is worthless. On the downside, they won't give you more than fifty quid even to write the car off.

[hawkida.livejournal.com]

He's covered third party by his own insurance. To add him to my insurance wouldn't be free. (I am already fully comp, myself.)

What I'm asking is, under what circumstances, is the fully comp actually worth having given that any accident that does damage to my car will write it off? (The excess is more than the car is theoretically worth.)