vector - Seeking Elevation Data for Scotland?

I have been searching for quality elevation data for the entire Scotland but I have not succeeded yet.

Do you know where to get the data in Raster or Vector formats?

Accuracy is very important as I intend to compare with other data.

Answer

If you are in academia then the obvious place to go would be edina and digimap.

If you are not, then have a look here for free elevation data. Of cause you could go to OS the national mapping agency of the UK and get a 50m terrain model.