So many good memories on here.... YES to 'you got an ology? You're a scientist!' And I don't think anyone has mentioned the one for Scotch VHS tapes. re-record,not fade away..... with the animated skeleton voiced by Derek Guyler.
I liked the (Aussie) one for the beer - Castlemaine I think- where they loaded the wagon up with 200-odd cans, and then said 'how about some sherry for the ladies' and the wagon collapsed, and they said 'I think we overdid it with the sherry.' 
ALSO, same beer (and the same campaign I think,) they sent a guy into the river to get the beer that had floated out on a raft or something, and he said 'there's no sharks in here are there?' And one guy said 'nahhh.' Then under his breath, he said 'crocodiles ate all the sharks.....'
On another note; did you all know that the R-whites Lemonade chap was the father of ELVIS COSTELLO? 
There are some I don't recall that are being mentioned on this thread, (maybe it's a regional thing,) but many of them I do recall, and they have brought back some nice memories.
The cinzano one with Len Rossiter and the awesome Joan Collins was one of my faves EVER.
And yeah I am (like some posters here) old enough to remember the wonderful Coca Cola ad with 'I'd like to teach the world to sing,' playing over it.
Also I liked the Cadbury's ads with the kids with the wacky eye movements and the weird techno track (tho that wasn't that long ago,) and the gorillia playing the drums. (That was when the taste of Cadbury's hadn't turned to shit. 
)
@BlueTrews27 YEP, I cannot EVER unhear 'you mean I'll only ever be good enough to play for Accrington Stanley!' That was for ad advert for milk I think. Poor Accrington Stanley LOL!
And yeah some ads (including the Acrrington Stanley one) stay with you (I mean the catchphrases,) like 'Made in Scotland from GIRRRDERS!' (Irn Bru.)
ACE thread! Thank you @TheGirlOnTheLanding