Ahem. OK. Let me state it more clearly. Colin from Whurr (http://www.whurr.co.uk/) has got back in touch, with "yes, yes, these people know what they're talking about, there's a market, there's nothing already there, we need their book!" from his proposal-readers, and he wants a sample chapter ASAP.
Basically it's as near a green light as it could be at this point. Time to get back in touch with Ana, discuss timings and strategies some more, draw up my quote and submit it to Katherine, and start drafting the sample chapter.
jubilant