Checked the track code. Here's the text:
Should I do something? Or they will get the letter by themselves?Delivery Attempted
Tracking no.
Sorry, we tried to deliver your parcel on 25-09-2018 but there didn’t seem to be anyone in. Please choose an option below.
From:
Option 1: collect your item from your local Royal Mail Customer Service Point. Remember to bring the 'Something for you card' we left or, the equivalent SMS or email notification if you received one, and one of these forms of I.D.
Option 2: arrange a Redelivery quickly and easily. For Channel Islands and Isle of Man please contact your postal service provider.