Saw them screwing this down as I walked past. Only on one side just now, expect it will be duplicated. What's odd is that this material (like the rough stuff from the top of a shed, presumably intended to be anti-skid) has been laid in these strips, primarily on the vertical, but some on the horizontal, but because of the uneven wooden surface, and the screws only every 60cm or so, the edges stick up a bit, and will most likely see them torn within a short space of time, or take a cyclist down as the wheel catches on the grippy raised edge while still on the through-the-gap-wood.
Wlil be interesting to see how/if this is finished...
Leamington lift bridge surfacing. by blackpuddinonnabike, on Flickr