I'm from the UK and wanting some advice on which type of breast implants are the best

Allergan and Mentor are FDA approved in the United States and the most widely used in this country.  Both are excellent implants and have had rigorous testing.  To learn more please read below:

There are advantages and disadvantages that you get for either implant. They both produce great results if the surgery was done properly. The skill of your surgeon and the technique he uses are what really makes the difference. If you are assured with your surgeon, then you may expect a good result with either.

Hello there.  There is no one 'best' implant and both Nagor and Allergan are very well known and well respected companies.  There are some differences between the warranties of the two makes, which might help you decide.There are other types of implants, such as polyurethane foam coated implants made by Polytech, which have advantages and disadvantages, so these may be worth considering when trying to choose what might be best for you.I always say that the most important choice is your surgeon rather than the implant, so if you are comfortable with your surgeon, I am sure that you will be fine with either Nagor or Allergan.Good luck.