You may or may not have seen news of this. Since the Three Bridges ride uses Boothferry, I run the number in the article and spoke to someone at the East Riding Council. This is his reply:
That means the bridge will be closed until the end of April. I don't know whether it will still be open for pedestrian and cycle traffic, but it would make sense to assume the worst and steer clear of it until May.Further to our telephone conversation I can confirm that the Boothferry Bridge closure will commence on Monday 21st February 2011 and last for upto 10 weeks.