I live in the UK and I go out for ice cream, but then we have a good ice cream parlour a walk from our house.
Anyway, further to the class question earlier, I am prepared to get flamed for this, but these are my personal views on class in the UK.
Working class - people who do jobs where you get your hands dirty, where you are likely to work standing up, less skilled manual work. Most likely to rent rather than own houses.
Middle class - People who sit at a desk. More qualified. Professional jobs. Likely to own their houses.
Upper middle classes - Higher up in the jobs than the middle classes. Some inherited money.
Upper class - Highly qualified job - doctors, lawyer, judges. Likely to have trust funds or inheritances.
Gentry - Lords, Ladies and royalty - inherit their houses - not as rich as people might think.
In my experience it is possible to move between working and middle classes. It is very possible to come from a working class background and to gain all the trappings of the middle classes.
However travelling from the middle to the upper class is impossible. I am, I guess, middle class. I went out with a very upper class guy when I was younger. His parents were a doctor and a lawyer, he had been privately educated at a very good school and was at Oxford. I felt completely out of place with his family and friends. I just didn't fit in.
In his youth my father, who was working class, had a 'dalliance' with a Lady. (Think Lady Chatterly). There was no way that anything could have come of it. Granted that was back in the 60s but I don't think it is much more different today.
Debutants aren't presented at court anymore but there is still a certain level of young ladies being found someone to marry. The problem at the core of Downton, that women can't inherit, still stands.
The gentry are not a rich as people think. I have been in many houses of lower ranks of the gentry and they are falling to pieces. People inherit houses and all the contents. They cannot afford to heat or run them. Big houses require staff but the money is not there to pay for them. Just think how much Downton costs to run each month. Often the family estate become a millstone round the neck of the eldest son. No one wants to be the one to lose the house on his watch.
It does open doors, but it's not like life in Downton anymore.