In theory it is possible to view at multiple points and I have had success at this, primarily watching people running sub 3 hours.
This year, though, my wife found it very very difficult to get away from Westferry and struggled to meet people around there due to the density of the crowds. I also ended up on the embankment around 4.5 hours in and it was uncomfortably busy. So maybe do a spot at the beginning and then a spot at the end.
Poplar High Street is my favourite spot now. It's around 21 miles in, so everyone looks very serious.
There's a Tesco on one side and a greasy spoon on the other. Greasy spoon side is easier to get away from, because you don't have to cross the road at all
In theory it is possible to view at multiple points and I have had success at this, primarily watching people running sub 3 hours.
This year, though, my wife found it very very difficult to get away from Westferry and struggled to meet people around there due to the density of the crowds. I also ended up on the embankment around 4.5 hours in and it was uncomfortably busy. So maybe do a spot at the beginning and then a spot at the end.