I beg to differ with you guys.
We ate at Rose & Crown on our last trip in Nov/Dec 2008 (which I have not gotten to in my reviews yet!). It was our first time and we were on the DDDDP. We had an ADR at I think 7pm ish. We arrived on time for our ADR and I did ask at the podium if we could have a patio seat and told them we were willing to wait. We did wait...about an hour...on the curb outside the pub people watching and hanging out. At about 8pm ish, we were indeed escorted to
THE best seat in the house (or outside of it as the case may be) on the patio on the closed (at least it started out closed!

) end of the patio. We had the most perfect view. We even watched a heron dive and catch a fish and then eat it while we were eating...the kids loved that. And we did not have any problems with people from inside the restaurant coming out to watch...what we had problems with were people who did eat there opening that formerly closed gate and squishing in around us...one even sat his beer down between my kids and then left his glass there when he left and another had the nerve to pull out one of our extra chairs and sit at our table!!!!! I was fuming! I should have given her my bill for the tip!
So, while it cannot be guaranteed, it can be granted upon request...it would depend on crowds though. It was an awesome place to watch from! And we were very pleasantly surprised with how good the food was too!