Setting off after parking my Volvo V50 1.6D DRIVe overnight in temperatures down to -16 degrees C, the car kangaroo jumped for a couple of minutes with the engine appearing to be cutting out. When joining the motorway after a drive of only about 500 meters I found the engine lacked any power, even with the accelerator to the floor, only managing 40mph uphill and 60mph down. I limped on and came off at the first junction after a drive of about 15 miles, parking up for about half an hour. Before calling the breakdown service I thought I would give the car a test round the car park and found it was now behaving properly, so continued my journey with no further problem. Could I have been suffering diesel freeze? If so how can I prevent it happening again, garaging the car not being an option, and could any damage have been done to the engine?