"They've forced open what is a very heavy sliding door which is only accessible from the inside and they've taken the store van and driven it into the glass front doors.
"They've then opened the doors up and collected as much stuff as they could under what was a wreck of broken glass and aluminum," he said.
Brown said they are very curious to know how the van was started as the keys were locked in a draw.
Amongst the loot that was taken was two Cervélo carbon gravel bikes.