Cold pressed and unrefined oils are the best oils you can buy. Instead of obtaining the oil through heat - which affects the natural make up of the oil - cold pressed oils are derived from purely mechanical means (no heat).
Meridian Foods are the organic produce brand behind the organic Safflower Oil (£4.80), which I recently purchased. The oil is yellow in colour, and smells almost-acidic, but is very mild in taste.
it has the consistency of rapeseed oil, and works well as a base for salad dressings.
Buy this oil from the Meridian website, or from Amazon and enjoy the change from olive oil to this cold-pressed variety.