I've mentioned this in replies for another post but just thought it might be handy for its own post so more peeps can see it.
As we all know public car parks, limited street parking and hospital car parks can be expensive or hard to find. I've found this website (am sure there are probably other similar) that allows you to rent parking spaces on people's driveways or allocated parking bays. It's very easy to use, you can book well in advance or last minute, for a few hours or a few days and most of all is a lot cheaper than car parks. I've used it for my trips to Kings and haven't encountered any problems.
Worth checking out to see what's available around your hospital of choice, may save you a few pennies. 😃