Going back to Saxon gate for a moment, here is the Declaration. It shows 26 spoilt votes, and doesn't define how (unusual). How then was it subsequently found that 400 or so votes were spoiled by voting for more than one candidate (allegedly on the advice of one of the polling clerks)?
Further, looking at some of the other Declarations, many have 20-40 spoilt votes marked for '(a) Want of Official Mark'. How can this be? Can people be smuggling in dodgy ballot papers in such quantities over a wide area? Really? Or is it the polling clerks messing up the 'official mark'? With several IOC candidates missing out by just a few votes, this does seem odd to me.