Thanks Six - I was hoping you might turn up, and I'm probably going to be paying a visit to your team at Fleet Street next week.
I don't have any visible bruising, didn't have a sudden sharp pain, and going up on tip toes doesn't hurt.
The bottom half of my calf is tender when pressed, hopping on one leg does hurt a little , and stretching is also slightly painful.
I haven't run for the last 3 days, and am going for a sports massage later today, but can't decide whether to try for a run tomorrow, or whether that might risk making it worse....