I inquired through LVO website whether my application has been received and the address to send updated documents and got the following reply.
LDNIMMIGRATION@international.gc.ca
Dear Sir/ Madam,
Your file has been received. You may send updated documents to the address below.
Yours sincerely, Client Service Unit (VCM)
Immigration and Medical Services Division | Direction de l'immigration et des services médicauxCanadian High Commission | Haut-commissariat du Canada38 Grosvenor StreetLondon, W1K 4AA | Londres, W1K 4AAUnited Kingdom | Royaume-Uni Government of Canada Web site: www.unitedkingdom.gc.ca
Email: http://www.canadainternational.gc.ca/united_kingdom-royaume_uni/visas/contact_visa_contactez.aspx?lang=eng