Because the Exmouth branch is closed all weekend, So services are terminating/starting at Exeter Central(or St James' Park).
Some nice shiny new track being put in at Lympstone Village. Thankfully it is a complete re-lay rather than merely putting new rails on the existing sleepers and ballast. The 142's dont seem to cope with the latter method of track renewal that well........
http://uk.youtube.com/watch?v=ya1hG7F_EPg