Visas that let you remain in the UK free of immigration restrictions, including British Citizenship
UK Permanent Residence and British Citizenship
After a suitable qualifying period of time has been spent in the UK you should be able to qualify for Indefinite Leave to Remain.
This is also known as ILR, Permanent Residence or Settled Status, depending on the method of qualification.
Once you are a Permanent Resident you are free of immigration restrictions and on your way to qualifying for British Citizenship.
Further information can be found below but get in touch if you would like to discuss your situation in detail.