Royal Mail registered mail delivery to North Hollywood California USA (Alert lost)

Another potential parcel lost status on the USPS tracking website "Alert". Below is an item posted via Royal Mail registered mail service from the UK to North Hollywood California USA on the 8 January 2016 and the last status was updated on the 11 January 2016 but there was no status updated by USPS since then and it stated "Alert" indicating something not right with the package. Either delivery fail or the address of the recipients cannot be found. This item then could be lost since there was no longer update.

Tracking Number: RN171493037GB

Alert
The delivery status for this item has not been updated as of January 11, 2016, 10:17 pm.

Product & Tracking Information

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Postal Product:
Features:
Registered Mail™



DATE & TIME STATUS OF ITEM LOCATION
January 11, 2016, 10:17 pm Delivery status not updated
The delivery status for this item has not been updated as of January 11, 2016, 10:17 pm.
January 11, 2016, 8:17 am Out for Delivery NORTH HOLLYWOOD, CA 91601
January 11, 2016, 8:07 am Sorting Complete NORTH HOLLYWOOD, CA 91601
January 11, 2016, 7:09 am Arrived at Unit NORTH HOLLYWOOD, CA 91601
January 11, 2016, 4:12 am Departed USPS Regional Facility SANTA CLARITA CA DISTRIBUTION CENTER
January 10, 2016, 9:41 pm Arrived at USPS Regional Facility SANTA CLARITA CA DISTRIBUTION CENTER
January 9, 2016, 10:08 am Departed USPS Regional Facility LOS ANGELES CA INTERNATIONAL DISTRIBUTION CENTER
January 9, 2016, 2:19 am Arrived at USPS Regional Facility LOS ANGELES CA INTERNATIONAL DISTRIBUTION CENTER
January 8, 2016, 12:25 pm Processed Through Facility ISC LOS ANGELES CA (USPS)
Origin Post is Preparing Shipment