See https://sentinel.esa.int/web/sentinel/user-guides/sentinel-2-msi/resolutions/spatial for a description of the bands available in Sentinel 2.
Here is a mosaic made in Tuiview:
After some issues with opening .kea files in QGIS (due to having reinstalled Ubuntu recently and needing to recompile KEAlib and then finding that due to being compiled against GDAL 2.1 libraries it didn't work in QGIS which was using GDAL 1.11), I sorted this out, and have a QGIS project file showing the image. I also show some placenames from OpenStreetMap, and hill names from www.hill-bagging.co.uk for context.
Some screenshots of QGIS are shown below:
|Bodmin Moor, Cornwall. Road construction can be seen at the lower left.|
|Falmouth and surrounding area.|
|Plymouth, Saltash and Torpoint and the Rame peninsula|