Jess has now been incubating her eggs for several days. As is usual, nothing exciting has happened so far.
However, if it is a bit tedious for us, one would have thought it must be more so for Jess - presumably female birds are programmed to get some satisfaction from incubating or the species would have died out years ago!
Bluetits normally incubate their eggs for about 12 days before they hatch out, so we should expect Jess's clutch to start hatching around 1st May.