Yeah, don't worry, Thorntons will be back soon, bigger and better than ever. This took me by surprise too. One day there were cars lined up to get gas and the next everything was being torn down.
Someone should time how quick it takes to get the new mega-convenience store and gas station up and running. Thorntons version 1.0 had been around for a long time. Clearly it could no longer house all of the junk food possibilities available in the early 21st century. Reboot!