I fail to see what the story is here. A red top comes up with an item from a "BBC insider" which basically could be anyone or no one - they have been known to make these things up before. The story seems to be that because there is no news on a series being commissioned then it must be the case that they aren't doing it. It's been only a few weeks and I'm sure that a number of things have to be done before any contracts are signed. For a start I doubt whether David Jason or Roy Clarke come cheap and why should they.
The BBC aren't under any obligation to do a series anyway, they never promised that, and if it really is that good what's to stop ITV or SKY stepping in? They did with Birds of a feather. I'm not sure viewing figures would mean much either in this case, simply because you could probably stick David Jason in anything on Christmas or Boxing Day and get 8-10 million watching just because of his rep with Only Fools, Darling Buds and Frost.
I'm sure if the BBC are interested one of the questions that they might ask Roy Clarke, and I know I would ask it, what's going to be the story going forward to carry any series and not just one series. There wasn't much of one in the Christmas special. To be honest I thought the special was ok, not great, but if given a choice of watching that again or one of the Ronnie Barker Open All Hours there would be no contest I'd choose the latter. I wouldn't mind seeing a series made, but if it isn't I can't say I'm that disappointed.