Royal Mail Registered Mail International Tracked and Signed to Canada - no updates

Item posted from Birmingham UK via Royal Mail Registered mail international tracked and signed on the 27 May 2017 to Canada. The tracking info has not been updated since last 28 May 2017 on its way to Toronto Canada which is already around 3 months. The Canada post also has no info about the tracking of the parcel. Below is the tracking number from Royal Mail post office.

Progress of your item
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Item:
RS821549435GB
Service
International Tracked & Signed
Latest update: It's on its way
Your item, posted on 27/05/17 with reference RS821549435GB has been passed to the overseas postal service for delivery in CANADA.
Where has my item been?
Date Time Status Track point
28/05/17 AM ON ITS WAY TOTORONTO CANADA CANADA
28/05/17 04:07 ARRIVED (MDN) AT HEATHROW WORLDWIDE DC
27/05/17 18:49 ITEM COLLECTED BIRMINGHAM MAIL CENTRE
27/05/17 18:48 ON ITS WAY TOHEATHROW WORLDWIDE DC BIRMINGHAM MAIL CENTRE