Lining paper. It will enable you to get a much higher quality of finish but it will take longer and cost a bit more. Assuming a 3m by 4m room- you will get at least 6 drops from a double roll of lining paper. Each roll is 56cm wide. Also assuming one window and a door. I would allow for 5 double rolls of 100) grade paper and one box of paste- that's about £25 based on toolstation prices. You will however need to factor in the cost of a pasting table and tools.