Great thread & doubtless will be useful when I get mine home at last, since I have the left dipped beam out (amongst others lol).
Seeing as how I'm such a cheapskate though I think what I'll be doing after checking the bulb, is giving the dash a friendly "tap" above the bonnet release & see if that makes a difference, then if it does I'll dremel the lid off the relay & clean the contacts with a points file!
(my reasoning being, if they take 10years+ for the arcing to build up crap from new, if I clean even 80% of it off I'll have good relays for 8years+ & that should be more than enough for my needs
I'll post back how I get on, if this is the course of action I take. Hoping it's just a bulb but I doubt it somehow... Just fed up of waiting now, next week till I can get the car home & time's dragging worse than lily savage!