In the meantime my Residence Card under EU law still on process but already received the certificate stating that I am allowed to work.

Questions:
1. My EU ( Latvian) partner held a Permanent Resident card and he's been here in the UK for 8 years already. If he would apply for British citizenship , will it affect my status as a Resident card holder? or will I be eligible to apply for British Citizenship also after 3 years?

** Residential requirement: says resident here in the UK for at least three years. Are the Residence card and Spouse visa counted on this or should be either ILR and EU permanent residence card?