Well, we had our Shanahan's 'doorstep' steaks. Very pleasant and tasty particularly the gravy (or is it jus), but I'd echo the concerns of other posters regarding value for money (or lack of). They were flexible enough to provide chicken dishes for the non-steak-eating-females of the party, even though there was no chicken on the menu. They made a point of providing a chair with armrests and some extra cushions to raise up the little one, which was most welcome.
I nearly had to pull out, as our little girl wasn't in the best of form (constipation), but threats from mother-in-law won the day. My description above of "more frequent trips to the loo than the average punter....a raised voice or two" was remarkably accurate. She certainly caused no more disruption than the table of celtic cub twenty-somethings beside us.
Anyway, thanks again for all the comments.