You did your biometrics and submitted your application at the London CVAC. The reason they did not take your passport is because you were returning to Ireland the same evening. For paper applications, your passport must be submitted along with your visa application. It's only for online applications that you will get a passport request (on approval).
You did not apply online, right?
Please send a Case Specific Enquiry and ask about your passport:
https://secure.cic.gc.ca/enquiries-renseignements/case-cas-eng.aspx?mission=london
I called them today again the lady said they will email you when they required the passports I told her that I applied paper base and she even told it's been forward to high commission as if you send passport without letter which will be in email they won't accept it I have send case specific enquiry as well what to do now please help