I have had CUI Allergan implants fitted in 2013.
If you are having no issues with your breasts and are happy with the size, no, just keep them and do you yearly follow ups with your medical doctor and mammagrams or ultrasounds as recommended.
As far as I am aware, there has been no recommendation to mandatorily remove cui implants. This all relates to the risk of ALCL from textured implants but this condition remains very rare, maybe 1:3000 - 1:25000. (remember ordinary breast cancer risk is higher than 1:10) If the breasts feel soft and natural and symmetrical, there is no reason to remove these implants. ALCL presents with a fluid swelling around the breast so if you feel that one of your breasts is enlarging then you should rapidly seek an opinion about this either by visiting a plastic surgeon or an NHS breast clinic. You would likely need a scan and a biopsy and possibly removal of implants and surrounding 'capsules' if scans indicated a problem or if there was ongoing uncertainty about diagnosis.best wishes