1. This is the tracking of your parcel:
Number: RJ854596146CN
Package Status: In Transit

Destination Country: United Kingdom
Origin Country: China
2016-12-04 20:58 Shanghai Pudong, left
2016-12-04 20:58 Shanghai Pudong, left hand navigation
2016-12-04 17:26 Shanghai Pudong, reach
2016-12-01 16:52 Wenzhou Exchange Bureau, have been exported directly
2016-12-01 16:24 Wenzhou Exchange Bureau, have been exported to open
2016-12-01 15:23 Two packs of central collection and sent to the processing centers in Wenzhou City, away, the next station "Wenzhou express"
2016-12-01 15:19 Two packs of central collection and sent to the processing centers in Wenzhou City,
2016-12-01 10:15 Two packs of central collection and sent to the processing centers in Wenzhou City, has received send
2016-11-29 20:06 Electronic information has been received
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2. Your parcel is On Route/In Transit to UK. Now it's up to Royal Mail Post to scan your parcel on arrival or when they have time to do it.

3. This time of year is the busiest time for all Post Office in the World so mail is slow.

4. Just continue to track your parcel on the Royal Mail site for any new movement.

Hope this help.