Bah! It is as we feared. Salters Lode lock will not be re-opening in time for Easter, so sorry Cambridge, you'll have to manage without us.
This leaves us with two options (well, three if you include staying at home, but I'm dying to get back on the boat, even if this means...) Option 1: Go up the Nene. Jim just suggested that we could spend our week going up the Nene to Northampton and back. Why? I asked... So that we could go to the Malt Shovel. Well, yes, I am very much looking forward to visiting this pub with its massive selection of real ales and continental beers, and I do like a journey to have an objective, but the cost-benefit analysis on that particular proposal is not positive.
My preferred option is to spend the time exploring the bits of the Middle Level that we might otherwise not get round to. A new assault on Holme Fen, for example; a run up to Dog in a Doublet; up Bevills Leam as far as possible from each end (it has a pumping station in the middle); to Upwell to drink in the Globe as planned; and to Welches dam lock, which used to be passable (indeed, Warrior was built to the maximum length with which it was possible to pass it) but is no longer...
All I can say at present is, sorry Cambridge that we won't be visiting after all, and watch this space to find out where we will be.