The Oxford v Cambridge boatrace must go. The nation is apparently expected to embrace this tedious spectacle of the elite and privileged doing their thing. I'm sure the pubs of Whitehawk are packed out on 'race day.'
The longer the race the more boring it is, I guess at least with a marathon there's a bit of scenery and they actually go somewhere, whereas the 10,000m all around the same track is turgidly boring so I would get rid of that and then introduce the tug of war to the olympics.