Yes, the work rate has fallen in many locations further south so the average pace has slowed overall so structures are still completing but far fewer than anyone would have expected 12 months ago and some structures often go months without being touched from the end of 1 stage to the start of the next.
Road bridges seem to be focused on much more than foot paths or farm crossing bridges.
The pace of work has fallen off on the southern 3 contracts (south of Southam) much more than BBV sites where the pace of construction was typically slower than the others.
As an example the sites near Wendover have been slowed down massively as the Wendover Tunnel was way behind (15-18months) so they have forced on working at max sensible pace on the tunnel but moving at 1/4 - 1/3 pace of the former pace on other near by structures.