The cartilage that is best for revision rhinoplasty is really determined by what needs to be done, and what cartilage is available in the nose itself.
My preferred choice for areas that require straight flat pieces of cartilage is the septum. If you have any septal cartilage left after your primary procedure it can be ideal for repair of deviations in the bridge, lengthening the tip, or de-rotating an over-rotated (up-turned) nose.
If there is not enough left in the septum, the rib is the next best choice for straight and flat segments of cartilage. It is also a very strong cartilage, and readily available.
Ear cartilage, which is generally curved, can be used effectively for repair of. tip deformities, and occasionally for repair of a curved or deviated bridge. There are also ways of using this cartilage for augmentation of the dorsum by dicing the cartilage into small 1mm cubes that can be inserted into a roll of temporal fascia (covering of the muscle in the temporal area). This procedure can be excellent in replacing cartilage in the bridge after over-reduction in a previous rhinoplasty.
In summary, the choice really depends on what you need, and what you have left in the septum.
The cost of revision rhinoplasty varies by geographic location, and what needs to be done to get your desired outcome, so it would be best for you to see a few revision rhinoplasty specialists in the UK for consultation to see what this would cost you.