Gag285 thanks for the information. I guess the last question is irrelevant now since switching visa will reset the clock.

Currently my wife is under PBS Tier 2 General (Principal) visa and I am under PBS Tier 2 Dependent visa. 1. I am looking forward to switch my Tier 2 Dependent visa to Tier 2 Principal visa as my company is willing to sponsor me. This is my first UK visa and will I be subjected to the cooling off req...