Royal Navy Austin K6 crane
These markings are for a Royal Navy Austin K6 crane serving with the Royal NAvy's Coastal Forces Maintenance Unit 2, which followed flotillas of motor torpedo boats up the European coast in 1944/45, moving up with the land forces. A photo of this vehicle can be found in this thread. Based on the time frame the vehicles must have been finished in overall SCC No 15 Olive Drab.
If you wish you may only order the markings that appear on the vehicle's doors.