What does (a) mean after the British patent number? According to a British patent number, can I know whether it is authorized or not?

A 1- European patent application specification with search report;

A2- European patent application specification without retrieval report;

A3- separately published search report;

A4- Supplementary search report of international application search report;

A8- corrected the title page of European patent application specification;

A9- European patent application specification is reproduced in full.

B 1- European patent specification;

B2—— The revised European patent specification is published again;

B3—— refers to the European patent specification that has been granted the patent right after substantive examination, and is re-published and published after being modified by the restrictive modification procedure;

B8- corrected the title page of the European patent specification;

B9- European patent specification reprinted in full.

C 1, C2 and C3 are public documents after this patent is partially invalid.

Please adopt the solution, thank you.