The site would extend further north, to the line where the concert enclosure ends. Serpentine Road walkers and runners would benefit – and incidentally so would a bat colony in one of the trees there. The event is the Parks’ biggest earner, attracting 4 million people over 45 days with a peak of around 30,000 at one time. Accommodating Winter Wonderland is never easy. But this year’s proposals look fairly reasonable.